diff --git a/src/test/java/org/apache/commons/math4/ExtendedFieldElementAbstractTest.java b/src/test/java/org/apache/commons/math4/ExtendedFieldElementAbstractTest.java
index b31445c..24860d9 100644
--- a/src/test/java/org/apache/commons/math4/ExtendedFieldElementAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/ExtendedFieldElementAbstractTest.java
@@ -19,7 +19,6 @@
 import org.apache.commons.numbers.arrays.LinearCombination;
 import org.apache.commons.rng.UniformRandomProvider;
 import org.apache.commons.rng.simple.RandomSource;
-import org.apache.commons.math4.RealFieldElement;
 import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.math4.util.MathArrays;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/TestUtils.java b/src/test/java/org/apache/commons/math4/TestUtils.java
index 0c73779..0c0b8bc 100644
--- a/src/test/java/org/apache/commons/math4/TestUtils.java
+++ b/src/test/java/org/apache/commons/math4/TestUtils.java
@@ -26,7 +26,6 @@
 import org.apache.commons.numbers.complex.Complex;
 import org.apache.commons.numbers.core.Precision;
 import org.apache.commons.statistics.distribution.ContinuousDistribution;
-import org.apache.commons.math4.FieldElement;
 import org.apache.commons.math4.complex.ComplexFormat;
 import org.apache.commons.math4.linear.FieldMatrix;
 import org.apache.commons.math4.linear.RealMatrix;
diff --git a/src/test/java/org/apache/commons/math4/analysis/differentiation/DSCompilerTest.java b/src/test/java/org/apache/commons/math4/analysis/differentiation/DSCompilerTest.java
index c466a5c..e70b9b2 100644
--- a/src/test/java/org/apache/commons/math4/analysis/differentiation/DSCompilerTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/differentiation/DSCompilerTest.java
@@ -21,7 +21,6 @@
 import java.util.HashMap;
 import java.util.Map;
 
-import org.apache.commons.math4.analysis.differentiation.DSCompiler;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.numbers.combinatorics.BinomialCoefficient;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/analysis/differentiation/DerivativeStructureTest.java b/src/test/java/org/apache/commons/math4/analysis/differentiation/DerivativeStructureTest.java
index 824b3e4..3890d4a 100644
--- a/src/test/java/org/apache/commons/math4/analysis/differentiation/DerivativeStructureTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/differentiation/DerivativeStructureTest.java
@@ -22,7 +22,6 @@
 
 import org.apache.commons.math4.ExtendedFieldElementAbstractTest;
 import org.apache.commons.math4.TestUtils;
-import org.apache.commons.math4.analysis.differentiation.DerivativeStructure;
 import org.apache.commons.math4.analysis.polynomials.PolynomialFunction;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
diff --git a/src/test/java/org/apache/commons/math4/analysis/function/GaussianTest.java b/src/test/java/org/apache/commons/math4/analysis/function/GaussianTest.java
index f3efeec..d9d904a 100644
--- a/src/test/java/org/apache/commons/math4/analysis/function/GaussianTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/function/GaussianTest.java
@@ -20,7 +20,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.differentiation.DerivativeStructure;
 import org.apache.commons.math4.analysis.differentiation.UnivariateDifferentiableFunction;
-import org.apache.commons.math4.analysis.function.Gaussian;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NullArgumentException;
diff --git a/src/test/java/org/apache/commons/math4/analysis/function/HarmonicOscillatorTest.java b/src/test/java/org/apache/commons/math4/analysis/function/HarmonicOscillatorTest.java
index 6b75e55..b1aac49 100644
--- a/src/test/java/org/apache/commons/math4/analysis/function/HarmonicOscillatorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/function/HarmonicOscillatorTest.java
@@ -19,7 +19,6 @@
 
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.differentiation.DerivativeStructure;
-import org.apache.commons.math4.analysis.function.HarmonicOscillator;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/function/LogisticTest.java b/src/test/java/org/apache/commons/math4/analysis/function/LogisticTest.java
index 4af1824..db25683 100644
--- a/src/test/java/org/apache/commons/math4/analysis/function/LogisticTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/function/LogisticTest.java
@@ -19,8 +19,6 @@
 
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.differentiation.DerivativeStructure;
-import org.apache.commons.math4.analysis.function.Logistic;
-import org.apache.commons.math4.analysis.function.Sigmoid;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NullArgumentException;
diff --git a/src/test/java/org/apache/commons/math4/analysis/function/LogitTest.java b/src/test/java/org/apache/commons/math4/analysis/function/LogitTest.java
index 9eb1b0a..f37ad1d 100644
--- a/src/test/java/org/apache/commons/math4/analysis/function/LogitTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/function/LogitTest.java
@@ -21,8 +21,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.differentiation.DerivativeStructure;
 import org.apache.commons.math4.analysis.differentiation.UnivariateDifferentiableFunction;
-import org.apache.commons.math4.analysis.function.Logit;
-import org.apache.commons.math4.analysis.function.Sigmoid;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.exception.OutOfRangeException;
diff --git a/src/test/java/org/apache/commons/math4/analysis/function/SigmoidTest.java b/src/test/java/org/apache/commons/math4/analysis/function/SigmoidTest.java
index 91b11a1..2f1b352 100644
--- a/src/test/java/org/apache/commons/math4/analysis/function/SigmoidTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/function/SigmoidTest.java
@@ -19,7 +19,6 @@
 
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.differentiation.DerivativeStructure;
-import org.apache.commons.math4.analysis.function.Sigmoid;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/analysis/function/StepFunctionTest.java b/src/test/java/org/apache/commons/math4/analysis/function/StepFunctionTest.java
index 994135c..dc7bff1 100644
--- a/src/test/java/org/apache/commons/math4/analysis/function/StepFunctionTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/function/StepFunctionTest.java
@@ -18,7 +18,6 @@
 package org.apache.commons.math4.analysis.function;
 
 import org.apache.commons.math4.analysis.UnivariateFunction;
-import org.apache.commons.math4.analysis.function.StepFunction;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NoDataException;
 import org.apache.commons.math4.exception.NonMonotonicSequenceException;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/MidPointIntegratorTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/MidPointIntegratorTest.java
index 9d1cf88..0474d27 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/MidPointIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/MidPointIntegratorTest.java
@@ -19,8 +19,6 @@
 import org.apache.commons.math4.analysis.QuinticFunction;
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.integration.MidPointIntegrator;
-import org.apache.commons.math4.analysis.integration.UnivariateIntegrator;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/RombergIntegratorTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/RombergIntegratorTest.java
index 1e5200e..0685c40 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/RombergIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/RombergIntegratorTest.java
@@ -19,8 +19,6 @@
 import org.apache.commons.math4.analysis.QuinticFunction;
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.integration.RombergIntegrator;
-import org.apache.commons.math4.analysis.integration.UnivariateIntegrator;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/SimpsonIntegratorTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/SimpsonIntegratorTest.java
index f4ed7bc..e47cd76 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/SimpsonIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/SimpsonIntegratorTest.java
@@ -21,8 +21,6 @@
 import org.apache.commons.math4.analysis.function.Identity;
 import org.apache.commons.math4.analysis.function.Inverse;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.integration.SimpsonIntegrator;
-import org.apache.commons.math4.analysis.integration.UnivariateIntegrator;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/TrapezoidIntegratorTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/TrapezoidIntegratorTest.java
index bb21487..1874e1c 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/TrapezoidIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/TrapezoidIntegratorTest.java
@@ -19,8 +19,6 @@
 import org.apache.commons.math4.analysis.QuinticFunction;
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.integration.TrapezoidIntegrator;
-import org.apache.commons.math4.analysis.integration.UnivariateIntegrator;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/BaseRuleFactoryTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/BaseRuleFactoryTest.java
index 3e79548..651339c 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/BaseRuleFactoryTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/BaseRuleFactoryTest.java
@@ -26,7 +26,6 @@
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import org.apache.commons.math4.analysis.integration.gauss.BaseRuleFactory;
 import org.apache.commons.math4.util.Pair;
 import org.junit.Test;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/GaussIntegratorTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/GaussIntegratorTest.java
index 07e0675..61a6a6d 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/GaussIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/GaussIntegratorTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Constant;
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegrator;
 import org.apache.commons.math4.util.Pair;
 import org.junit.Test;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/GaussianQuadratureAbstractTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/GaussianQuadratureAbstractTest.java
index 10d9bc4..7428c35 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/GaussianQuadratureAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/GaussianQuadratureAbstractTest.java
@@ -17,7 +17,6 @@
 package org.apache.commons.math4.analysis.integration.gauss;
 
 import org.apache.commons.math4.analysis.function.Power;
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegrator;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Test;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/HermiteParametricTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/HermiteParametricTest.java
index 5bba84e..d555f71 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/HermiteParametricTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/HermiteParametricTest.java
@@ -22,8 +22,6 @@
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 import org.junit.runners.Parameterized.Parameters;
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegratorFactory;
-import org.apache.commons.math4.analysis.integration.gauss.HermiteRuleFactory;
 import org.apache.commons.math4.util.FastMath;
 
 /**
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/HermiteTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/HermiteTest.java
index fc07048..4fe6788 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/HermiteTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/HermiteTest.java
@@ -17,9 +17,6 @@
 package org.apache.commons.math4.analysis.integration.gauss;
 
 import org.apache.commons.math4.analysis.UnivariateFunction;
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegrator;
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegratorFactory;
-import org.apache.commons.math4.analysis.integration.gauss.HermiteRuleFactory;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Test;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreHighPrecisionParametricTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreHighPrecisionParametricTest.java
index 896f8e0..9850f70 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreHighPrecisionParametricTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreHighPrecisionParametricTest.java
@@ -19,8 +19,6 @@
 import java.util.ArrayList;
 import java.util.Collection;
 
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegratorFactory;
-import org.apache.commons.math4.analysis.integration.gauss.LegendreHighPrecisionRuleFactory;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 import org.junit.runners.Parameterized.Parameters;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreHighPrecisionTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreHighPrecisionTest.java
index acdecdc..ca54b42 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreHighPrecisionTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreHighPrecisionTest.java
@@ -20,9 +20,6 @@
 import org.apache.commons.math4.analysis.function.Cos;
 import org.apache.commons.math4.analysis.function.Inverse;
 import org.apache.commons.math4.analysis.function.Log;
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegrator;
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegratorFactory;
-import org.apache.commons.math4.analysis.integration.gauss.LegendreHighPrecisionRuleFactory;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreParametricTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreParametricTest.java
index 8126111..78cb8fe 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreParametricTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreParametricTest.java
@@ -19,8 +19,6 @@
 import java.util.ArrayList;
 import java.util.Collection;
 
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegratorFactory;
-import org.apache.commons.math4.analysis.integration.gauss.LegendreRuleFactory;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 import org.junit.runners.Parameterized.Parameters;
diff --git a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreTest.java b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreTest.java
index f21753b..13a64b0 100644
--- a/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/integration/gauss/LegendreTest.java
@@ -20,9 +20,6 @@
 import org.apache.commons.math4.analysis.function.Cos;
 import org.apache.commons.math4.analysis.function.Inverse;
 import org.apache.commons.math4.analysis.function.Log;
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegrator;
-import org.apache.commons.math4.analysis.integration.gauss.GaussIntegratorFactory;
-import org.apache.commons.math4.analysis.integration.gauss.LegendreRuleFactory;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/analysis/interpolation/DividedDifferenceInterpolatorTest.java b/src/test/java/org/apache/commons/math4/analysis/interpolation/DividedDifferenceInterpolatorTest.java
index 7db781a..f19d73d 100644
--- a/src/test/java/org/apache/commons/math4/analysis/interpolation/DividedDifferenceInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/interpolation/DividedDifferenceInterpolatorTest.java
@@ -19,8 +19,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Expm1;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.interpolation.DividedDifferenceInterpolator;
-import org.apache.commons.math4.analysis.interpolation.UnivariateInterpolator;
 import org.apache.commons.math4.exception.NonMonotonicSequenceException;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/analysis/interpolation/FieldHermiteInterpolatorTest.java b/src/test/java/org/apache/commons/math4/analysis/interpolation/FieldHermiteInterpolatorTest.java
index 572435d..15f11d6 100644
--- a/src/test/java/org/apache/commons/math4/analysis/interpolation/FieldHermiteInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/interpolation/FieldHermiteInterpolatorTest.java
@@ -18,7 +18,6 @@
 
 import java.util.Random;
 
-import org.apache.commons.math4.analysis.interpolation.FieldHermiteInterpolator;
 import org.apache.commons.math4.analysis.polynomials.PolynomialFunction;
 import org.apache.commons.math4.dfp.Dfp;
 import org.apache.commons.math4.dfp.DfpField;
diff --git a/src/test/java/org/apache/commons/math4/analysis/interpolation/HermiteInterpolatorTest.java b/src/test/java/org/apache/commons/math4/analysis/interpolation/HermiteInterpolatorTest.java
index f07fa36..cd78b42 100644
--- a/src/test/java/org/apache/commons/math4/analysis/interpolation/HermiteInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/interpolation/HermiteInterpolatorTest.java
@@ -19,7 +19,6 @@
 import java.util.Random;
 
 import org.apache.commons.math4.analysis.differentiation.DerivativeStructure;
-import org.apache.commons.math4.analysis.interpolation.HermiteInterpolator;
 import org.apache.commons.math4.analysis.polynomials.PolynomialFunction;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NoDataException;
diff --git a/src/test/java/org/apache/commons/math4/analysis/interpolation/LinearInterpolatorTest.java b/src/test/java/org/apache/commons/math4/analysis/interpolation/LinearInterpolatorTest.java
index 38b44aa..d4fc053 100644
--- a/src/test/java/org/apache/commons/math4/analysis/interpolation/LinearInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/interpolation/LinearInterpolatorTest.java
@@ -18,8 +18,6 @@
 
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.analysis.UnivariateFunction;
-import org.apache.commons.math4.analysis.interpolation.LinearInterpolator;
-import org.apache.commons.math4.analysis.interpolation.UnivariateInterpolator;
 import org.apache.commons.math4.analysis.polynomials.PolynomialFunction;
 import org.apache.commons.math4.analysis.polynomials.PolynomialSplineFunction;
 import org.apache.commons.math4.exception.DimensionMismatchException;
diff --git a/src/test/java/org/apache/commons/math4/analysis/interpolation/LoessInterpolatorTest.java b/src/test/java/org/apache/commons/math4/analysis/interpolation/LoessInterpolatorTest.java
index 6c3c40f..4c5b15b 100644
--- a/src/test/java/org/apache/commons/math4/analysis/interpolation/LoessInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/interpolation/LoessInterpolatorTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.analysis.interpolation;
 
-import org.apache.commons.math4.analysis.interpolation.LoessInterpolator;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NoDataException;
 import org.apache.commons.math4.exception.NonMonotonicSequenceException;
diff --git a/src/test/java/org/apache/commons/math4/analysis/interpolation/NevilleInterpolatorTest.java b/src/test/java/org/apache/commons/math4/analysis/interpolation/NevilleInterpolatorTest.java
index 764da07..ff43e67 100644
--- a/src/test/java/org/apache/commons/math4/analysis/interpolation/NevilleInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/interpolation/NevilleInterpolatorTest.java
@@ -19,8 +19,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Expm1;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.interpolation.NevilleInterpolator;
-import org.apache.commons.math4.analysis.interpolation.UnivariateInterpolator;
 import org.apache.commons.math4.exception.NonMonotonicSequenceException;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/analysis/interpolation/UnivariatePeriodicInterpolatorTest.java b/src/test/java/org/apache/commons/math4/analysis/interpolation/UnivariatePeriodicInterpolatorTest.java
index 907b2ac..6547dcf 100644
--- a/src/test/java/org/apache/commons/math4/analysis/interpolation/UnivariatePeriodicInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/interpolation/UnivariatePeriodicInterpolatorTest.java
@@ -19,9 +19,6 @@
 import java.util.Random;
 
 import org.apache.commons.math4.analysis.UnivariateFunction;
-import org.apache.commons.math4.analysis.interpolation.LinearInterpolator;
-import org.apache.commons.math4.analysis.interpolation.UnivariateInterpolator;
-import org.apache.commons.math4.analysis.interpolation.UnivariatePeriodicInterpolator;
 import org.apache.commons.math4.exception.NonMonotonicSequenceException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/polynomials/PolynomialFunctionLagrangeFormTest.java b/src/test/java/org/apache/commons/math4/analysis/polynomials/PolynomialFunctionLagrangeFormTest.java
index 301bf52..a35bb42 100644
--- a/src/test/java/org/apache/commons/math4/analysis/polynomials/PolynomialFunctionLagrangeFormTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/polynomials/PolynomialFunctionLagrangeFormTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.analysis.polynomials;
 
-import org.apache.commons.math4.analysis.polynomials.PolynomialFunctionLagrangeForm;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/analysis/polynomials/PolynomialFunctionNewtonFormTest.java b/src/test/java/org/apache/commons/math4/analysis/polynomials/PolynomialFunctionNewtonFormTest.java
index b9e61d3..62dfa04 100644
--- a/src/test/java/org/apache/commons/math4/analysis/polynomials/PolynomialFunctionNewtonFormTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/polynomials/PolynomialFunctionNewtonFormTest.java
@@ -17,7 +17,6 @@
 package org.apache.commons.math4.analysis.polynomials;
 
 import org.apache.commons.math4.analysis.differentiation.DerivativeStructure;
-import org.apache.commons.math4.analysis.polynomials.PolynomialFunctionNewtonForm;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/BaseSecantSolverAbstractTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/BaseSecantSolverAbstractTest.java
index 9d16686..571a58e 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/BaseSecantSolverAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/BaseSecantSolverAbstractTest.java
@@ -20,12 +20,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.XMinus5Function;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.solvers.AllowedSolution;
-import org.apache.commons.math4.analysis.solvers.BaseSecantSolver;
-import org.apache.commons.math4.analysis.solvers.BracketedUnivariateSolver;
-import org.apache.commons.math4.analysis.solvers.PegasusSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolverUtils;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/BisectionSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/BisectionSolverTest.java
index d92ff1c..790b3a0 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/BisectionSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/BisectionSolverTest.java
@@ -19,7 +19,6 @@
 import org.apache.commons.math4.analysis.QuinticFunction;
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.solvers.BisectionSolver;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/BracketingNthOrderBrentSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/BracketingNthOrderBrentSolverTest.java
index 2a4e8f1..12beace 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/BracketingNthOrderBrentSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/BracketingNthOrderBrentSolverTest.java
@@ -21,10 +21,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.differentiation.DerivativeStructure;
 import org.apache.commons.math4.analysis.differentiation.UnivariateDifferentiableFunction;
-import org.apache.commons.math4.analysis.solvers.AllowedSolution;
-import org.apache.commons.math4.analysis.solvers.BracketingNthOrderBrentSolver;
-import org.apache.commons.math4.analysis.solvers.NewtonRaphsonSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.exception.TooManyEvaluationsException;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/BrentSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/BrentSolverTest.java
index 79af777..154c44b 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/BrentSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/BrentSolverTest.java
@@ -26,8 +26,6 @@
 import org.apache.commons.math4.analysis.function.Inverse;
 import org.apache.commons.math4.analysis.function.Sin;
 import org.apache.commons.math4.analysis.function.Sqrt;
-import org.apache.commons.math4.analysis.solvers.BrentSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.exception.TooManyEvaluationsException;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolverTest.java
index a8dcf2a..05d74dd 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolverTest.java
@@ -18,7 +18,6 @@
 package org.apache.commons.math4.analysis.solvers;
 
 import org.apache.commons.math4.analysis.RealFieldUnivariateFunction;
-import org.apache.commons.math4.analysis.solvers.AllowedSolution;
 import org.apache.commons.math4.dfp.Dfp;
 import org.apache.commons.math4.dfp.DfpField;
 import org.apache.commons.math4.dfp.DfpMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/IllinoisSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/IllinoisSolverTest.java
index 04680d9..31d0aca 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/IllinoisSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/IllinoisSolverTest.java
@@ -17,9 +17,6 @@
 
 package org.apache.commons.math4.analysis.solvers;
 
-import org.apache.commons.math4.analysis.solvers.IllinoisSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
-
 /**
  * Test case for {@link IllinoisSolver Illinois} solver.
  *
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/LaguerreSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/LaguerreSolverTest.java
index c0c65a4..c152ec3 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/LaguerreSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/LaguerreSolverTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.numbers.complex.Complex;
 import org.apache.commons.math4.analysis.polynomials.PolynomialFunction;
-import org.apache.commons.math4.analysis.solvers.LaguerreSolver;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/MullerSolver2Test.java b/src/test/java/org/apache/commons/math4/analysis/solvers/MullerSolver2Test.java
index b11fefc..8538e2c 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/MullerSolver2Test.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/MullerSolver2Test.java
@@ -20,8 +20,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Expm1;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.solvers.MullerSolver2;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/MullerSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/MullerSolverTest.java
index e82be52..27dbcd5 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/MullerSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/MullerSolverTest.java
@@ -20,8 +20,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Expm1;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.solvers.MullerSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/NewtonRaphsonSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/NewtonRaphsonSolverTest.java
index 807469e..9c4de6e 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/NewtonRaphsonSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/NewtonRaphsonSolverTest.java
@@ -19,7 +19,6 @@
 import org.apache.commons.math4.analysis.QuinticFunction;
 import org.apache.commons.math4.analysis.differentiation.UnivariateDifferentiableFunction;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.solvers.NewtonRaphsonSolver;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/PegasusSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/PegasusSolverTest.java
index d6de7a3..151094e 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/PegasusSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/PegasusSolverTest.java
@@ -17,9 +17,6 @@
 
 package org.apache.commons.math4.analysis.solvers;
 
-import org.apache.commons.math4.analysis.solvers.PegasusSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
-
 /**
  * Test case for {@link PegasusSolver Pegasus} solver.
  *
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/RegulaFalsiSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/RegulaFalsiSolverTest.java
index 774c807..7f3b578 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/RegulaFalsiSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/RegulaFalsiSolverTest.java
@@ -18,8 +18,6 @@
 package org.apache.commons.math4.analysis.solvers;
 
 import org.apache.commons.math4.analysis.UnivariateFunction;
-import org.apache.commons.math4.analysis.solvers.RegulaFalsiSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
 import org.apache.commons.math4.exception.ConvergenceException;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/RiddersSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/RiddersSolverTest.java
index fcff3e5..7dc970b 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/RiddersSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/RiddersSolverTest.java
@@ -20,8 +20,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Expm1;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.solvers.RiddersSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/SecantSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/SecantSolverTest.java
index 59b8af9..ed85136 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/SecantSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/SecantSolverTest.java
@@ -17,9 +17,6 @@
 
 package org.apache.commons.math4.analysis.solvers;
 
-import org.apache.commons.math4.analysis.solvers.SecantSolver;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolver;
-
 /**
  * Test case for {@link SecantSolver Secant} solver.
  *
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/UnivariateSolverUtilsTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/UnivariateSolverUtilsTest.java
index ea9ca3d..9ab5c16 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/UnivariateSolverUtilsTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/UnivariateSolverUtilsTest.java
@@ -20,7 +20,6 @@
 import org.apache.commons.math4.analysis.QuinticFunction;
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Sin;
-import org.apache.commons.math4.analysis.solvers.UnivariateSolverUtils;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NullArgumentException;
diff --git a/src/test/java/org/apache/commons/math4/dfp/Decimal10.java b/src/test/java/org/apache/commons/math4/dfp/Decimal10.java
index aee0568..0147000 100644
--- a/src/test/java/org/apache/commons/math4/dfp/Decimal10.java
+++ b/src/test/java/org/apache/commons/math4/dfp/Decimal10.java
@@ -17,10 +17,6 @@
 
 package org.apache.commons.math4.dfp;
 
-import org.apache.commons.math4.dfp.Dfp;
-import org.apache.commons.math4.dfp.DfpDec;
-import org.apache.commons.math4.dfp.DfpField;
-
 public class Decimal10 extends DfpDec {
 
     Decimal10(final DfpField factory) {
diff --git a/src/test/java/org/apache/commons/math4/dfp/DfpDecTest.java b/src/test/java/org/apache/commons/math4/dfp/DfpDecTest.java
index 7432e1f..c90e73d 100644
--- a/src/test/java/org/apache/commons/math4/dfp/DfpDecTest.java
+++ b/src/test/java/org/apache/commons/math4/dfp/DfpDecTest.java
@@ -17,9 +17,6 @@
 
 package org.apache.commons.math4.dfp;
 
-import org.apache.commons.math4.dfp.Dfp;
-import org.apache.commons.math4.dfp.DfpDec;
-import org.apache.commons.math4.dfp.DfpField;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
diff --git a/src/test/java/org/apache/commons/math4/dfp/DfpMathTest.java b/src/test/java/org/apache/commons/math4/dfp/DfpMathTest.java
index 949114f..6d36746 100644
--- a/src/test/java/org/apache/commons/math4/dfp/DfpMathTest.java
+++ b/src/test/java/org/apache/commons/math4/dfp/DfpMathTest.java
@@ -17,9 +17,6 @@
 
 package org.apache.commons.math4.dfp;
 
-import org.apache.commons.math4.dfp.Dfp;
-import org.apache.commons.math4.dfp.DfpField;
-import org.apache.commons.math4.dfp.DfpMath;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
diff --git a/src/test/java/org/apache/commons/math4/distribution/AbstractIntegerDistributionTest.java b/src/test/java/org/apache/commons/math4/distribution/AbstractIntegerDistributionTest.java
index 2aeb2f6..c44d4c5 100644
--- a/src/test/java/org/apache/commons/math4/distribution/AbstractIntegerDistributionTest.java
+++ b/src/test/java/org/apache/commons/math4/distribution/AbstractIntegerDistributionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.distribution;
 
-import org.apache.commons.math4.distribution.AbstractIntegerDistribution;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/distribution/AbstractRealDistributionTest.java b/src/test/java/org/apache/commons/math4/distribution/AbstractRealDistributionTest.java
index 396dc4a..6f46010 100644
--- a/src/test/java/org/apache/commons/math4/distribution/AbstractRealDistributionTest.java
+++ b/src/test/java/org/apache/commons/math4/distribution/AbstractRealDistributionTest.java
@@ -19,7 +19,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.integration.RombergIntegrator;
 import org.apache.commons.math4.analysis.integration.UnivariateIntegrator;
-import org.apache.commons.math4.distribution.AbstractRealDistribution;
 import org.apache.commons.math4.exception.OutOfRangeException;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/distribution/EnumeratedIntegerDistributionTest.java b/src/test/java/org/apache/commons/math4/distribution/EnumeratedIntegerDistributionTest.java
index 1b03bee..d485059 100644
--- a/src/test/java/org/apache/commons/math4/distribution/EnumeratedIntegerDistributionTest.java
+++ b/src/test/java/org/apache/commons/math4/distribution/EnumeratedIntegerDistributionTest.java
@@ -18,7 +18,6 @@
 
 import java.util.Arrays;
 import org.apache.commons.statistics.distribution.DiscreteDistribution;
-import org.apache.commons.math4.distribution.EnumeratedIntegerDistribution;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.MathArithmeticException;
 import org.apache.commons.math4.exception.NotANumberException;
diff --git a/src/test/java/org/apache/commons/math4/distribution/EnumeratedRealDistributionTest.java b/src/test/java/org/apache/commons/math4/distribution/EnumeratedRealDistributionTest.java
index def4d06..792a518 100644
--- a/src/test/java/org/apache/commons/math4/distribution/EnumeratedRealDistributionTest.java
+++ b/src/test/java/org/apache/commons/math4/distribution/EnumeratedRealDistributionTest.java
@@ -22,8 +22,6 @@
 import java.util.List;
 
 import org.apache.commons.statistics.distribution.ContinuousDistribution;
-import org.apache.commons.math4.distribution.EnumeratedDistribution;
-import org.apache.commons.math4.distribution.EnumeratedRealDistribution;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.MathArithmeticException;
 import org.apache.commons.math4.exception.NotANumberException;
diff --git a/src/test/java/org/apache/commons/math4/distribution/IntegerDistributionAbstractTest.java b/src/test/java/org/apache/commons/math4/distribution/IntegerDistributionAbstractTest.java
index 09749d9..a19c20a 100644
--- a/src/test/java/org/apache/commons/math4/distribution/IntegerDistributionAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/distribution/IntegerDistributionAbstractTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.statistics.distribution.DiscreteDistribution;
 import org.apache.commons.math4.TestUtils;
-import org.apache.commons.math4.distribution.AbstractIntegerDistribution;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.rng.simple.RandomSource;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/distribution/MixtureMultivariateNormalDistributionTest.java b/src/test/java/org/apache/commons/math4/distribution/MixtureMultivariateNormalDistributionTest.java
index bde149c..b9ad9ea 100644
--- a/src/test/java/org/apache/commons/math4/distribution/MixtureMultivariateNormalDistributionTest.java
+++ b/src/test/java/org/apache/commons/math4/distribution/MixtureMultivariateNormalDistributionTest.java
@@ -18,7 +18,6 @@
 
 import java.util.List;
 
-import org.apache.commons.math4.distribution.MultivariateNormalDistribution;
 import org.apache.commons.math4.exception.MathArithmeticException;
 import org.apache.commons.math4.exception.NotPositiveException;
 import org.apache.commons.rng.simple.RandomSource;
diff --git a/src/test/java/org/apache/commons/math4/distribution/MultivariateNormalDistributionTest.java b/src/test/java/org/apache/commons/math4/distribution/MultivariateNormalDistributionTest.java
index 83c3d45..f017cb8 100644
--- a/src/test/java/org/apache/commons/math4/distribution/MultivariateNormalDistributionTest.java
+++ b/src/test/java/org/apache/commons/math4/distribution/MultivariateNormalDistributionTest.java
@@ -17,7 +17,6 @@
 
 package org.apache.commons.math4.distribution;
 
-import org.apache.commons.math4.distribution.MultivariateNormalDistribution;
 import org.apache.commons.statistics.distribution.NormalDistribution;
 import org.apache.commons.math4.linear.RealMatrix;
 import org.apache.commons.rng.simple.RandomSource;
diff --git a/src/test/java/org/apache/commons/math4/distribution/fitting/MultivariateNormalMixtureExpectationMaximizationTest.java b/src/test/java/org/apache/commons/math4/distribution/fitting/MultivariateNormalMixtureExpectationMaximizationTest.java
index 5adb201..4ff01b1 100644
--- a/src/test/java/org/apache/commons/math4/distribution/fitting/MultivariateNormalMixtureExpectationMaximizationTest.java
+++ b/src/test/java/org/apache/commons/math4/distribution/fitting/MultivariateNormalMixtureExpectationMaximizationTest.java
@@ -22,7 +22,6 @@
 
 import org.apache.commons.math4.distribution.MixtureMultivariateNormalDistribution;
 import org.apache.commons.math4.distribution.MultivariateNormalDistribution;
-import org.apache.commons.math4.distribution.fitting.MultivariateNormalMixtureExpectationMaximization;
 import org.apache.commons.math4.exception.ConvergenceException;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
diff --git a/src/test/java/org/apache/commons/math4/exception/DimensionMismatchExceptionTest.java b/src/test/java/org/apache/commons/math4/exception/DimensionMismatchExceptionTest.java
index 310c024..89e2c0e 100644
--- a/src/test/java/org/apache/commons/math4/exception/DimensionMismatchExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/DimensionMismatchExceptionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.exception;
 
-import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/exception/MaxCountExceededExceptionTest.java b/src/test/java/org/apache/commons/math4/exception/MaxCountExceededExceptionTest.java
index 9772a27..3fec166 100644
--- a/src/test/java/org/apache/commons/math4/exception/MaxCountExceededExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/MaxCountExceededExceptionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.exception;
 
-import org.apache.commons.math4.exception.MaxCountExceededException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/exception/NonMonotonicSequenceExceptionTest.java b/src/test/java/org/apache/commons/math4/exception/NonMonotonicSequenceExceptionTest.java
index 823034a..60aaff8 100644
--- a/src/test/java/org/apache/commons/math4/exception/NonMonotonicSequenceExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/NonMonotonicSequenceExceptionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.exception;
 
-import org.apache.commons.math4.exception.NonMonotonicSequenceException;
 import org.apache.commons.math4.util.MathArrays;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/exception/NotPositiveExceptionTest.java b/src/test/java/org/apache/commons/math4/exception/NotPositiveExceptionTest.java
index 359b227..3508e67 100644
--- a/src/test/java/org/apache/commons/math4/exception/NotPositiveExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/NotPositiveExceptionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.exception;
 
-import org.apache.commons.math4.exception.NotPositiveException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/exception/NotStrictlyPositiveExceptionTest.java b/src/test/java/org/apache/commons/math4/exception/NotStrictlyPositiveExceptionTest.java
index 8760d91..8a14618 100644
--- a/src/test/java/org/apache/commons/math4/exception/NotStrictlyPositiveExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/NotStrictlyPositiveExceptionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.exception;
 
-import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/exception/NumberIsTooLargeExceptionTest.java b/src/test/java/org/apache/commons/math4/exception/NumberIsTooLargeExceptionTest.java
index 1f3f8ce..bfde48b 100644
--- a/src/test/java/org/apache/commons/math4/exception/NumberIsTooLargeExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/NumberIsTooLargeExceptionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.exception;
 
-import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/exception/NumberIsTooSmallExceptionTest.java b/src/test/java/org/apache/commons/math4/exception/NumberIsTooSmallExceptionTest.java
index abc7305..4eb3986 100644
--- a/src/test/java/org/apache/commons/math4/exception/NumberIsTooSmallExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/NumberIsTooSmallExceptionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.exception;
 
-import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/exception/OutOfRangeExceptionTest.java b/src/test/java/org/apache/commons/math4/exception/OutOfRangeExceptionTest.java
index 7b0105b..8af6602 100644
--- a/src/test/java/org/apache/commons/math4/exception/OutOfRangeExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/OutOfRangeExceptionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.exception;
 
-import org.apache.commons.math4.exception.OutOfRangeException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/exception/TooManyEvaluationsExceptionTest.java b/src/test/java/org/apache/commons/math4/exception/TooManyEvaluationsExceptionTest.java
index 5dce64b..29d0cdd 100644
--- a/src/test/java/org/apache/commons/math4/exception/TooManyEvaluationsExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/TooManyEvaluationsExceptionTest.java
@@ -18,7 +18,6 @@
 
 import java.text.MessageFormat;
 
-import org.apache.commons.math4.exception.TooManyEvaluationsException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/exception/util/ArgUtilsTest.java b/src/test/java/org/apache/commons/math4/exception/util/ArgUtilsTest.java
index e7fddf6..2dd588c 100644
--- a/src/test/java/org/apache/commons/math4/exception/util/ArgUtilsTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/util/ArgUtilsTest.java
@@ -19,7 +19,6 @@
 import java.util.List;
 import java.util.ArrayList;
 
-import org.apache.commons.math4.exception.util.ArgUtils;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/exception/util/ExceptionContextTest.java b/src/test/java/org/apache/commons/math4/exception/util/ExceptionContextTest.java
index e1ce45f..68f9062 100644
--- a/src/test/java/org/apache/commons/math4/exception/util/ExceptionContextTest.java
+++ b/src/test/java/org/apache/commons/math4/exception/util/ExceptionContextTest.java
@@ -24,8 +24,6 @@
 import java.io.ByteArrayOutputStream;
 import java.io.ByteArrayInputStream;
 
-import org.apache.commons.math4.exception.util.ExceptionContext;
-import org.apache.commons.math4.exception.util.LocalizedFormats;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/filter/KalmanFilterTest.java b/src/test/java/org/apache/commons/math4/filter/KalmanFilterTest.java
index fbe786b..3d848dc 100644
--- a/src/test/java/org/apache/commons/math4/filter/KalmanFilterTest.java
+++ b/src/test/java/org/apache/commons/math4/filter/KalmanFilterTest.java
@@ -16,11 +16,6 @@
 
 import org.apache.commons.statistics.distribution.ContinuousDistribution;
 import org.apache.commons.statistics.distribution.NormalDistribution;
-import org.apache.commons.math4.filter.DefaultMeasurementModel;
-import org.apache.commons.math4.filter.DefaultProcessModel;
-import org.apache.commons.math4.filter.KalmanFilter;
-import org.apache.commons.math4.filter.MeasurementModel;
-import org.apache.commons.math4.filter.ProcessModel;
 import org.apache.commons.math4.linear.Array2DRowRealMatrix;
 import org.apache.commons.math4.linear.ArrayRealVector;
 import org.apache.commons.math4.linear.MatrixDimensionMismatchException;
diff --git a/src/test/java/org/apache/commons/math4/fitting/GaussianCurveFitterTest.java b/src/test/java/org/apache/commons/math4/fitting/GaussianCurveFitterTest.java
index 0624f9a..42d9e66 100644
--- a/src/test/java/org/apache/commons/math4/fitting/GaussianCurveFitterTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/GaussianCurveFitterTest.java
@@ -18,8 +18,6 @@
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.TooManyIterationsException;
-import org.apache.commons.math4.fitting.GaussianCurveFitter;
-import org.apache.commons.math4.fitting.WeightedObservedPoints;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/fitting/HarmonicCurveFitterTest.java b/src/test/java/org/apache/commons/math4/fitting/HarmonicCurveFitterTest.java
index 98905f7..e0e32b7 100644
--- a/src/test/java/org/apache/commons/math4/fitting/HarmonicCurveFitterTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/HarmonicCurveFitterTest.java
@@ -24,9 +24,6 @@
 import org.apache.commons.math4.analysis.function.HarmonicOscillator;
 import org.apache.commons.math4.exception.MathIllegalStateException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
-import org.apache.commons.math4.fitting.HarmonicCurveFitter;
-import org.apache.commons.math4.fitting.WeightedObservedPoint;
-import org.apache.commons.math4.fitting.WeightedObservedPoints;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/fitting/PolynomialCurveFitterTest.java b/src/test/java/org/apache/commons/math4/fitting/PolynomialCurveFitterTest.java
index 5817611..47f5413 100644
--- a/src/test/java/org/apache/commons/math4/fitting/PolynomialCurveFitterTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/PolynomialCurveFitterTest.java
@@ -23,8 +23,6 @@
 import org.apache.commons.statistics.distribution.ContinuousDistribution;
 import org.apache.commons.statistics.distribution.UniformContinuousDistribution;
 import org.apache.commons.math4.exception.ConvergenceException;
-import org.apache.commons.math4.fitting.PolynomialCurveFitter;
-import org.apache.commons.math4.fitting.WeightedObservedPoints;
 import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.rng.simple.RandomSource;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/fitting/SimpleCurveFitterTest.java b/src/test/java/org/apache/commons/math4/fitting/SimpleCurveFitterTest.java
index 36d3e92..b7a8216 100644
--- a/src/test/java/org/apache/commons/math4/fitting/SimpleCurveFitterTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/SimpleCurveFitterTest.java
@@ -23,8 +23,6 @@
 import org.apache.commons.math4.analysis.polynomials.PolynomialFunction;
 import org.apache.commons.statistics.distribution.ContinuousDistribution;
 import org.apache.commons.statistics.distribution.UniformContinuousDistribution;
-import org.apache.commons.math4.fitting.SimpleCurveFitter;
-import org.apache.commons.math4.fitting.WeightedObservedPoints;
 import org.apache.commons.rng.simple.RandomSource;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/fitting/WeightedObservedPointsTest.java b/src/test/java/org/apache/commons/math4/fitting/WeightedObservedPointsTest.java
index 1022847..ea0e9c8 100644
--- a/src/test/java/org/apache/commons/math4/fitting/WeightedObservedPointsTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/WeightedObservedPointsTest.java
@@ -20,8 +20,6 @@
 
 import org.junit.Assert;
 import org.junit.Test;
-import org.apache.commons.math4.fitting.WeightedObservedPoint;
-import org.apache.commons.math4.fitting.WeightedObservedPoints;
 import org.apache.commons.numbers.core.Precision;
 
 /**
diff --git a/src/test/java/org/apache/commons/math4/fitting/leastsquares/AbstractLeastSquaresOptimizerAbstractTest.java b/src/test/java/org/apache/commons/math4/fitting/leastsquares/AbstractLeastSquaresOptimizerAbstractTest.java
index ccc24ae..6aa8b8a 100644
--- a/src/test/java/org/apache/commons/math4/fitting/leastsquares/AbstractLeastSquaresOptimizerAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/leastsquares/AbstractLeastSquaresOptimizerAbstractTest.java
@@ -21,10 +21,6 @@
 import org.apache.commons.math4.analysis.MultivariateVectorFunction;
 import org.apache.commons.math4.exception.ConvergenceException;
 import org.apache.commons.math4.exception.DimensionMismatchException;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresBuilder;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresOptimizer;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem;
-import org.apache.commons.math4.fitting.leastsquares.MultivariateJacobianFunction;
 import org.apache.commons.math4.fitting.leastsquares.LeastSquaresOptimizer.Optimum;
 import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem.Evaluation;
 import org.apache.commons.math4.linear.Array2DRowRealMatrix;
diff --git a/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationRmsCheckerTest.java b/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationRmsCheckerTest.java
index ef09b0e..933f9d8 100644
--- a/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationRmsCheckerTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationRmsCheckerTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.fitting.leastsquares;
 
-import org.apache.commons.math4.fitting.leastsquares.EvaluationRmsChecker;
 import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem.Evaluation;
 import org.apache.commons.math4.linear.RealMatrix;
 import org.apache.commons.math4.linear.RealVector;
diff --git a/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationTest.java b/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationTest.java
index 43dd903..15540f3 100644
--- a/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationTest.java
@@ -17,11 +17,6 @@
 import org.apache.commons.math4.analysis.MultivariateMatrixFunction;
 import org.apache.commons.math4.analysis.MultivariateVectorFunction;
 import org.apache.commons.math4.exception.MathIllegalStateException;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresBuilder;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresFactory;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem;
-import org.apache.commons.math4.fitting.leastsquares.MultivariateJacobianFunction;
-import org.apache.commons.math4.fitting.leastsquares.ValueAndJacobianFunction;
 import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem.Evaluation;
 import org.apache.commons.math4.linear.ArrayRealVector;
 import org.apache.commons.math4.linear.DiagonalMatrix;
diff --git a/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationTestValidation.java b/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationTestValidation.java
index ad1cbc2..761c08a 100644
--- a/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationTestValidation.java
+++ b/src/test/java/org/apache/commons/math4/fitting/leastsquares/EvaluationTestValidation.java
@@ -13,8 +13,6 @@
  */
 package org.apache.commons.math4.fitting.leastsquares;
 
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresBuilder;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem;
 import org.apache.commons.math4.linear.ArrayRealVector;
 import org.apache.commons.math4.linear.DiagonalMatrix;
 import org.apache.commons.math4.linear.RealVector;
diff --git a/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithCholeskyTest.java b/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithCholeskyTest.java
index c6d26d4..562dc6c 100644
--- a/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithCholeskyTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithCholeskyTest.java
@@ -19,9 +19,6 @@
 
 import org.apache.commons.math4.exception.ConvergenceException;
 import org.apache.commons.math4.exception.TooManyEvaluationsException;
-import org.apache.commons.math4.fitting.leastsquares.GaussNewtonOptimizer;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresOptimizer;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem;
 import org.apache.commons.math4.fitting.leastsquares.GaussNewtonOptimizer.Decomposition;
 import org.apache.commons.math4.optim.SimpleVectorValueChecker;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithLUTest.java b/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithLUTest.java
index f7a5ef9..595be3c 100644
--- a/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithLUTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithLUTest.java
@@ -19,9 +19,6 @@
 
 import org.apache.commons.math4.exception.ConvergenceException;
 import org.apache.commons.math4.exception.TooManyEvaluationsException;
-import org.apache.commons.math4.fitting.leastsquares.GaussNewtonOptimizer;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresOptimizer;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem;
 import org.apache.commons.math4.fitting.leastsquares.GaussNewtonOptimizer.Decomposition;
 import org.apache.commons.math4.optim.SimpleVectorValueChecker;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithQRTest.java b/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithQRTest.java
index 9b9f86c..c7653ad 100644
--- a/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithQRTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithQRTest.java
@@ -19,9 +19,6 @@
 
 import org.apache.commons.math4.exception.ConvergenceException;
 import org.apache.commons.math4.exception.TooManyEvaluationsException;
-import org.apache.commons.math4.fitting.leastsquares.GaussNewtonOptimizer;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresOptimizer;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem;
 import org.apache.commons.math4.fitting.leastsquares.GaussNewtonOptimizer.Decomposition;
 import org.apache.commons.math4.optim.SimpleVectorValueChecker;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithSVDTest.java b/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithSVDTest.java
index 5c7e415..e177bc9 100644
--- a/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithSVDTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/leastsquares/GaussNewtonOptimizerWithSVDTest.java
@@ -23,9 +23,6 @@
 import org.apache.commons.geometry.core.precision.EpsilonDoublePrecisionContext;
 import org.apache.commons.math4.exception.ConvergenceException;
 import org.apache.commons.math4.exception.TooManyEvaluationsException;
-import org.apache.commons.math4.fitting.leastsquares.GaussNewtonOptimizer;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresOptimizer;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem;
 import org.apache.commons.math4.fitting.leastsquares.GaussNewtonOptimizer.Decomposition;
 import org.apache.commons.math4.fitting.leastsquares.LeastSquaresOptimizer.Optimum;
 import org.apache.commons.math4.optim.SimpleVectorValueChecker;
diff --git a/src/test/java/org/apache/commons/math4/fitting/leastsquares/MinpackTest.java b/src/test/java/org/apache/commons/math4/fitting/leastsquares/MinpackTest.java
index e68a518..c668122 100644
--- a/src/test/java/org/apache/commons/math4/fitting/leastsquares/MinpackTest.java
+++ b/src/test/java/org/apache/commons/math4/fitting/leastsquares/MinpackTest.java
@@ -22,9 +22,6 @@
 import org.apache.commons.math4.analysis.MultivariateMatrixFunction;
 import org.apache.commons.math4.analysis.MultivariateVectorFunction;
 import org.apache.commons.math4.exception.TooManyEvaluationsException;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresBuilder;
-import org.apache.commons.math4.fitting.leastsquares.LeastSquaresProblem;
-import org.apache.commons.math4.fitting.leastsquares.LevenbergMarquardtOptimizer;
 import org.apache.commons.math4.fitting.leastsquares.LeastSquaresOptimizer.Optimum;
 import org.apache.commons.math4.linear.DiagonalMatrix;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/genetics/BinaryChromosomeTest.java b/src/test/java/org/apache/commons/math4/genetics/BinaryChromosomeTest.java
index 4525fb4..478501f 100644
--- a/src/test/java/org/apache/commons/math4/genetics/BinaryChromosomeTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/BinaryChromosomeTest.java
@@ -18,8 +18,6 @@
 
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.Chromosome;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/BinaryMutationTest.java b/src/test/java/org/apache/commons/math4/genetics/BinaryMutationTest.java
index 44e5bdb..3ab3be8 100644
--- a/src/test/java/org/apache/commons/math4/genetics/BinaryMutationTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/BinaryMutationTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.genetics;
 
 
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.BinaryMutation;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/ChromosomeTest.java b/src/test/java/org/apache/commons/math4/genetics/ChromosomeTest.java
index 091ed8d..1eb00b2 100644
--- a/src/test/java/org/apache/commons/math4/genetics/ChromosomeTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/ChromosomeTest.java
@@ -20,9 +20,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ListPopulation;
-import org.apache.commons.math4.genetics.Population;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/CycleCrossoverTest.java b/src/test/java/org/apache/commons/math4/genetics/CycleCrossoverTest.java
index 862bc40..6780c02 100644
--- a/src/test/java/org/apache/commons/math4/genetics/CycleCrossoverTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/CycleCrossoverTest.java
@@ -18,11 +18,6 @@
 
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ChromosomePair;
-import org.apache.commons.math4.genetics.CrossoverPolicy;
-import org.apache.commons.math4.genetics.CycleCrossover;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/DummyBinaryChromosome.java b/src/test/java/org/apache/commons/math4/genetics/DummyBinaryChromosome.java
index 30700cf..e4f326b 100644
--- a/src/test/java/org/apache/commons/math4/genetics/DummyBinaryChromosome.java
+++ b/src/test/java/org/apache/commons/math4/genetics/DummyBinaryChromosome.java
@@ -18,9 +18,6 @@
 
 import java.util.List;
 
-import org.apache.commons.math4.genetics.AbstractListChromosome;
-import org.apache.commons.math4.genetics.BinaryChromosome;
-
 /**
  * Implementation of BinaryChromosome for testing purposes
  */
diff --git a/src/test/java/org/apache/commons/math4/genetics/DummyListChromosome.java b/src/test/java/org/apache/commons/math4/genetics/DummyListChromosome.java
index c78f67e..36d2ddd 100644
--- a/src/test/java/org/apache/commons/math4/genetics/DummyListChromosome.java
+++ b/src/test/java/org/apache/commons/math4/genetics/DummyListChromosome.java
@@ -19,9 +19,6 @@
 import java.util.Arrays;
 import java.util.List;
 
-import org.apache.commons.math4.genetics.AbstractListChromosome;
-import org.apache.commons.math4.genetics.InvalidRepresentationException;
-
 /**
  * Implementation of ListChromosome for testing purposes
  */
diff --git a/src/test/java/org/apache/commons/math4/genetics/DummyRandomKey.java b/src/test/java/org/apache/commons/math4/genetics/DummyRandomKey.java
index f8af835..e933df6 100644
--- a/src/test/java/org/apache/commons/math4/genetics/DummyRandomKey.java
+++ b/src/test/java/org/apache/commons/math4/genetics/DummyRandomKey.java
@@ -18,9 +18,6 @@
 
 import java.util.List;
 
-import org.apache.commons.math4.genetics.AbstractListChromosome;
-import org.apache.commons.math4.genetics.RandomKey;
-
 /**
  * Implementation of RandomKey for testing purposes
  */
diff --git a/src/test/java/org/apache/commons/math4/genetics/ElitisticListPopulationTest.java b/src/test/java/org/apache/commons/math4/genetics/ElitisticListPopulationTest.java
index e231830..b835d72 100644
--- a/src/test/java/org/apache/commons/math4/genetics/ElitisticListPopulationTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/ElitisticListPopulationTest.java
@@ -21,9 +21,6 @@
 import java.util.List;
 
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ElitisticListPopulation;
-import org.apache.commons.math4.genetics.Population;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/FitnessCachingTest.java b/src/test/java/org/apache/commons/math4/genetics/FitnessCachingTest.java
index 0903c49..6caa22f 100644
--- a/src/test/java/org/apache/commons/math4/genetics/FitnessCachingTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/FitnessCachingTest.java
@@ -20,16 +20,6 @@
 import java.util.LinkedList;
 import java.util.List;
 
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.BinaryMutation;
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ElitisticListPopulation;
-import org.apache.commons.math4.genetics.FixedGenerationCount;
-import org.apache.commons.math4.genetics.GeneticAlgorithm;
-import org.apache.commons.math4.genetics.OnePointCrossover;
-import org.apache.commons.math4.genetics.Population;
-import org.apache.commons.math4.genetics.StoppingCondition;
-import org.apache.commons.math4.genetics.TournamentSelection;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/FixedElapsedTimeTest.java b/src/test/java/org/apache/commons/math4/genetics/FixedElapsedTimeTest.java
index fdfa971..d88eeaa 100644
--- a/src/test/java/org/apache/commons/math4/genetics/FixedElapsedTimeTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/FixedElapsedTimeTest.java
@@ -19,9 +19,6 @@
 import java.util.Iterator;
 import java.util.concurrent.TimeUnit;
 
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.FixedElapsedTime;
-import org.apache.commons.math4.genetics.Population;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/genetics/FixedGenerationCountTest.java b/src/test/java/org/apache/commons/math4/genetics/FixedGenerationCountTest.java
index 07e9e04..b49fe2d 100644
--- a/src/test/java/org/apache/commons/math4/genetics/FixedGenerationCountTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/FixedGenerationCountTest.java
@@ -19,9 +19,6 @@
 
 import java.util.Iterator;
 
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.FixedGenerationCount;
-import org.apache.commons.math4.genetics.Population;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/GeneticAlgorithmTestBinary.java b/src/test/java/org/apache/commons/math4/genetics/GeneticAlgorithmTestBinary.java
index fc442d3..00b0cfb 100644
--- a/src/test/java/org/apache/commons/math4/genetics/GeneticAlgorithmTestBinary.java
+++ b/src/test/java/org/apache/commons/math4/genetics/GeneticAlgorithmTestBinary.java
@@ -20,17 +20,6 @@
 import java.util.LinkedList;
 import java.util.List;
 
-import org.apache.commons.math4.genetics.AbstractListChromosome;
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.BinaryMutation;
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ElitisticListPopulation;
-import org.apache.commons.math4.genetics.FixedGenerationCount;
-import org.apache.commons.math4.genetics.GeneticAlgorithm;
-import org.apache.commons.math4.genetics.OnePointCrossover;
-import org.apache.commons.math4.genetics.Population;
-import org.apache.commons.math4.genetics.StoppingCondition;
-import org.apache.commons.math4.genetics.TournamentSelection;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/GeneticAlgorithmTestPermutations.java b/src/test/java/org/apache/commons/math4/genetics/GeneticAlgorithmTestPermutations.java
index 1e01915..abd03c0 100644
--- a/src/test/java/org/apache/commons/math4/genetics/GeneticAlgorithmTestPermutations.java
+++ b/src/test/java/org/apache/commons/math4/genetics/GeneticAlgorithmTestPermutations.java
@@ -20,17 +20,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.commons.math4.genetics.AbstractListChromosome;
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ElitisticListPopulation;
-import org.apache.commons.math4.genetics.FixedGenerationCount;
-import org.apache.commons.math4.genetics.GeneticAlgorithm;
-import org.apache.commons.math4.genetics.OnePointCrossover;
-import org.apache.commons.math4.genetics.Population;
-import org.apache.commons.math4.genetics.RandomKey;
-import org.apache.commons.math4.genetics.RandomKeyMutation;
-import org.apache.commons.math4.genetics.StoppingCondition;
-import org.apache.commons.math4.genetics.TournamentSelection;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/genetics/ListPopulationTest.java b/src/test/java/org/apache/commons/math4/genetics/ListPopulationTest.java
index 1d337ab..de6a37d 100644
--- a/src/test/java/org/apache/commons/math4/genetics/ListPopulationTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/ListPopulationTest.java
@@ -23,10 +23,6 @@
 import org.apache.commons.math4.exception.NotPositiveException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ListPopulation;
-import org.apache.commons.math4.genetics.Population;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/NPointCrossoverTest.java b/src/test/java/org/apache/commons/math4/genetics/NPointCrossoverTest.java
index a03185e..3e9b60d 100644
--- a/src/test/java/org/apache/commons/math4/genetics/NPointCrossoverTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/NPointCrossoverTest.java
@@ -21,11 +21,6 @@
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ChromosomePair;
-import org.apache.commons.math4.genetics.CrossoverPolicy;
-import org.apache.commons.math4.genetics.NPointCrossover;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/OnePointCrossoverTest.java b/src/test/java/org/apache/commons/math4/genetics/OnePointCrossoverTest.java
index 482aad0..70bbb38 100644
--- a/src/test/java/org/apache/commons/math4/genetics/OnePointCrossoverTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/OnePointCrossoverTest.java
@@ -16,9 +16,6 @@
  */
 package org.apache.commons.math4.genetics;
 
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.ChromosomePair;
-import org.apache.commons.math4.genetics.OnePointCrossover;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/OrderedCrossoverTest.java b/src/test/java/org/apache/commons/math4/genetics/OrderedCrossoverTest.java
index 44fd972..92a8b88 100644
--- a/src/test/java/org/apache/commons/math4/genetics/OrderedCrossoverTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/OrderedCrossoverTest.java
@@ -22,11 +22,6 @@
 
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ChromosomePair;
-import org.apache.commons.math4.genetics.CrossoverPolicy;
-import org.apache.commons.math4.genetics.OrderedCrossover;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/RandomKeyMutationTest.java b/src/test/java/org/apache/commons/math4/genetics/RandomKeyMutationTest.java
index 3488f25..f7854fc 100644
--- a/src/test/java/org/apache/commons/math4/genetics/RandomKeyMutationTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/RandomKeyMutationTest.java
@@ -17,10 +17,6 @@
 package org.apache.commons.math4.genetics;
 
 
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.MutationPolicy;
-import org.apache.commons.math4.genetics.RandomKey;
-import org.apache.commons.math4.genetics.RandomKeyMutation;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/RandomKeyTest.java b/src/test/java/org/apache/commons/math4/genetics/RandomKeyTest.java
index e8ef32b..02a9150 100644
--- a/src/test/java/org/apache/commons/math4/genetics/RandomKeyTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/RandomKeyTest.java
@@ -22,7 +22,6 @@
 import java.util.List;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.genetics.RandomKey;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/TournamentSelectionTest.java b/src/test/java/org/apache/commons/math4/genetics/TournamentSelectionTest.java
index bd3395a..ecb7781 100644
--- a/src/test/java/org/apache/commons/math4/genetics/TournamentSelectionTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/TournamentSelectionTest.java
@@ -16,10 +16,6 @@
  */
 package org.apache.commons.math4.genetics;
 
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ChromosomePair;
-import org.apache.commons.math4.genetics.ElitisticListPopulation;
-import org.apache.commons.math4.genetics.TournamentSelection;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/genetics/UniformCrossoverTest.java b/src/test/java/org/apache/commons/math4/genetics/UniformCrossoverTest.java
index 208aace..e15b6bb 100644
--- a/src/test/java/org/apache/commons/math4/genetics/UniformCrossoverTest.java
+++ b/src/test/java/org/apache/commons/math4/genetics/UniformCrossoverTest.java
@@ -23,11 +23,6 @@
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.genetics.BinaryChromosome;
-import org.apache.commons.math4.genetics.Chromosome;
-import org.apache.commons.math4.genetics.ChromosomePair;
-import org.apache.commons.math4.genetics.CrossoverPolicy;
-import org.apache.commons.math4.genetics.UniformCrossover;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/Array2DRowRealMatrixTest.java b/src/test/java/org/apache/commons/math4/linear/Array2DRowRealMatrixTest.java
index ad17b48..9db196f 100644
--- a/src/test/java/org/apache/commons/math4/linear/Array2DRowRealMatrixTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/Array2DRowRealMatrixTest.java
@@ -26,16 +26,6 @@
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.linear.Array2DRowRealMatrix;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.DefaultRealMatrixChangingVisitor;
-import org.apache.commons.math4.linear.DefaultRealMatrixPreservingVisitor;
-import org.apache.commons.math4.linear.LUDecomposition;
-import org.apache.commons.math4.linear.MatrixDimensionMismatchException;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
 import org.apache.commons.math4.util.FastMath;
 
 /**
diff --git a/src/test/java/org/apache/commons/math4/linear/ArrayFieldVectorTest.java b/src/test/java/org/apache/commons/math4/linear/ArrayFieldVectorTest.java
index 04aa835..1f417f2 100644
--- a/src/test/java/org/apache/commons/math4/linear/ArrayFieldVectorTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/ArrayFieldVectorTest.java
@@ -29,11 +29,6 @@
 import org.apache.commons.math4.dfp.Dfp;
 import org.apache.commons.math4.util.BigReal;
 import org.apache.commons.math4.util.BigRealField;
-import org.apache.commons.math4.linear.ArrayFieldVector;
-import org.apache.commons.math4.linear.FieldMatrix;
-import org.apache.commons.math4.linear.FieldVector;
-import org.apache.commons.math4.linear.FieldVectorChangingVisitor;
-import org.apache.commons.math4.linear.FieldVectorPreservingVisitor;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/ArrayRealVectorTest.java b/src/test/java/org/apache/commons/math4/linear/ArrayRealVectorTest.java
index 44e7ed9..4c7b445 100644
--- a/src/test/java/org/apache/commons/math4/linear/ArrayRealVectorTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/ArrayRealVectorTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.linear;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.RealVector;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/BlockFieldMatrixTest.java b/src/test/java/org/apache/commons/math4/linear/BlockFieldMatrixTest.java
index 8ca0358..f2ea857 100644
--- a/src/test/java/org/apache/commons/math4/linear/BlockFieldMatrixTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/BlockFieldMatrixTest.java
@@ -31,15 +31,6 @@
 import org.apache.commons.math4.dfp.Dfp;
 import org.apache.commons.math4.util.BigReal;
 import org.apache.commons.math4.util.BigRealField;
-import org.apache.commons.math4.linear.ArrayFieldVector;
-import org.apache.commons.math4.linear.BlockFieldMatrix;
-import org.apache.commons.math4.linear.DefaultFieldMatrixChangingVisitor;
-import org.apache.commons.math4.linear.DefaultFieldMatrixPreservingVisitor;
-import org.apache.commons.math4.linear.FieldLUDecomposition;
-import org.apache.commons.math4.linear.FieldMatrix;
-import org.apache.commons.math4.linear.FieldVector;
-import org.apache.commons.math4.linear.MatrixDimensionMismatchException;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
 
 /**
  * Test cases for the {@link BlockFieldMatrix} class.
diff --git a/src/test/java/org/apache/commons/math4/linear/BlockRealMatrixTest.java b/src/test/java/org/apache/commons/math4/linear/BlockRealMatrixTest.java
index ce08b43..a1c1f3a 100644
--- a/src/test/java/org/apache/commons/math4/linear/BlockRealMatrixTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/BlockRealMatrixTest.java
@@ -27,15 +27,6 @@
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.BlockRealMatrix;
-import org.apache.commons.math4.linear.DefaultRealMatrixChangingVisitor;
-import org.apache.commons.math4.linear.DefaultRealMatrixPreservingVisitor;
-import org.apache.commons.math4.linear.LUDecomposition;
-import org.apache.commons.math4.linear.MatrixDimensionMismatchException;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
 import org.apache.commons.math4.util.FastMath;
 
 /**
diff --git a/src/test/java/org/apache/commons/math4/linear/CholeskyDecompositionTest.java b/src/test/java/org/apache/commons/math4/linear/CholeskyDecompositionTest.java
index 875ea9a..c3af861 100644
--- a/src/test/java/org/apache/commons/math4/linear/CholeskyDecompositionTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/CholeskyDecompositionTest.java
@@ -17,12 +17,6 @@
 
 package org.apache.commons.math4.linear;
 
-import org.apache.commons.math4.linear.CholeskyDecomposition;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.NonPositiveDefiniteMatrixException;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.NonSymmetricMatrixException;
-import org.apache.commons.math4.linear.RealMatrix;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/CholeskySolverTest.java b/src/test/java/org/apache/commons/math4/linear/CholeskySolverTest.java
index 93c192d..c423684 100644
--- a/src/test/java/org/apache/commons/math4/linear/CholeskySolverTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/CholeskySolverTest.java
@@ -18,10 +18,6 @@
 package org.apache.commons.math4.linear;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.linear.CholeskyDecomposition;
-import org.apache.commons.math4.linear.DecompositionSolver;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RealMatrix;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/ConjugateGradientTest.java b/src/test/java/org/apache/commons/math4/linear/ConjugateGradientTest.java
index 9cbbc8f..6672db9 100644
--- a/src/test/java/org/apache/commons/math4/linear/ConjugateGradientTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/ConjugateGradientTest.java
@@ -21,17 +21,6 @@
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.MathUnsupportedOperationException;
 import org.apache.commons.math4.exception.MaxCountExceededException;
-import org.apache.commons.math4.linear.Array2DRowRealMatrix;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.ConjugateGradient;
-import org.apache.commons.math4.linear.IterativeLinearSolver;
-import org.apache.commons.math4.linear.IterativeLinearSolverEvent;
-import org.apache.commons.math4.linear.JacobiPreconditioner;
-import org.apache.commons.math4.linear.NonPositiveDefiniteOperatorException;
-import org.apache.commons.math4.linear.NonSquareOperatorException;
-import org.apache.commons.math4.linear.PreconditionedIterativeLinearSolver;
-import org.apache.commons.math4.linear.RealLinearOperator;
-import org.apache.commons.math4.linear.RealVector;
 import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.math4.util.IterationEvent;
 import org.apache.commons.math4.util.IterationListener;
diff --git a/src/test/java/org/apache/commons/math4/linear/DiagonalMatrixTest.java b/src/test/java/org/apache/commons/math4/linear/DiagonalMatrixTest.java
index 388fc07..78ce22c 100644
--- a/src/test/java/org/apache/commons/math4/linear/DiagonalMatrixTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/DiagonalMatrixTest.java
@@ -21,12 +21,6 @@
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.linear.Array2DRowRealMatrix;
-import org.apache.commons.math4.linear.DiagonalMatrix;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.linear.SingularMatrixException;
 import org.apache.commons.numbers.core.Precision;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/linear/EigenDecompositionTest.java b/src/test/java/org/apache/commons/math4/linear/EigenDecompositionTest.java
index dc78537..68dc745 100644
--- a/src/test/java/org/apache/commons/math4/linear/EigenDecompositionTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/EigenDecompositionTest.java
@@ -23,13 +23,6 @@
 import org.apache.commons.statistics.distribution.ContinuousDistribution;
 import org.apache.commons.statistics.distribution.NormalDistribution;
 import org.apache.commons.math4.exception.MathUnsupportedOperationException;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.EigenDecomposition;
-import org.apache.commons.math4.linear.LUDecomposition;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.linear.TriDiagonalTransformer;
 import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.math4.util.MathArrays;
 import org.apache.commons.numbers.core.Precision;
diff --git a/src/test/java/org/apache/commons/math4/linear/EigenSolverTest.java b/src/test/java/org/apache/commons/math4/linear/EigenSolverTest.java
index cf0794f..b5ef3d4 100644
--- a/src/test/java/org/apache/commons/math4/linear/EigenSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/EigenSolverTest.java
@@ -20,11 +20,6 @@
 import java.util.Random;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.linear.DecompositionSolver;
-import org.apache.commons.math4.linear.EigenDecomposition;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.SingularMatrixException;
 import org.apache.commons.numbers.core.Precision;
 import org.junit.Test;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/linear/FieldLUDecompositionTest.java b/src/test/java/org/apache/commons/math4/linear/FieldLUDecompositionTest.java
index 83585b2..159128e 100644
--- a/src/test/java/org/apache/commons/math4/linear/FieldLUDecompositionTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/FieldLUDecompositionTest.java
@@ -21,10 +21,6 @@
 import org.junit.Assert;
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.dfp.Dfp;
-import org.apache.commons.math4.linear.Array2DRowFieldMatrix;
-import org.apache.commons.math4.linear.FieldLUDecomposition;
-import org.apache.commons.math4.linear.FieldMatrix;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
 
 public class FieldLUDecompositionTest {
     private Dfp[][] testData = {
diff --git a/src/test/java/org/apache/commons/math4/linear/FieldLUSolverTest.java b/src/test/java/org/apache/commons/math4/linear/FieldLUSolverTest.java
index b4322aa..8c6f17c 100644
--- a/src/test/java/org/apache/commons/math4/linear/FieldLUSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/FieldLUSolverTest.java
@@ -19,13 +19,6 @@
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.dfp.Dfp;
-import org.apache.commons.math4.linear.Array2DRowFieldMatrix;
-import org.apache.commons.math4.linear.FieldDecompositionSolver;
-import org.apache.commons.math4.linear.FieldLUDecomposition;
-import org.apache.commons.math4.linear.FieldMatrix;
-import org.apache.commons.math4.linear.FieldVector;
-import org.apache.commons.math4.linear.SingularMatrixException;
-import org.apache.commons.math4.linear.SparseFieldVector;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/FieldMatrixImplTest.java b/src/test/java/org/apache/commons/math4/linear/FieldMatrixImplTest.java
index 5b5e097..162e739 100644
--- a/src/test/java/org/apache/commons/math4/linear/FieldMatrixImplTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/FieldMatrixImplTest.java
@@ -30,15 +30,6 @@
 import org.apache.commons.math4.dfp.Dfp;
 import org.apache.commons.math4.util.BigReal;
 import org.apache.commons.math4.util.BigRealField;
-import org.apache.commons.math4.linear.Array2DRowFieldMatrix;
-import org.apache.commons.math4.linear.ArrayFieldVector;
-import org.apache.commons.math4.linear.DefaultFieldMatrixChangingVisitor;
-import org.apache.commons.math4.linear.DefaultFieldMatrixPreservingVisitor;
-import org.apache.commons.math4.linear.FieldLUDecomposition;
-import org.apache.commons.math4.linear.FieldMatrix;
-import org.apache.commons.math4.linear.FieldVector;
-import org.apache.commons.math4.linear.MatrixDimensionMismatchException;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
 
 /**
  * Test cases for the {@link Array2DRowFieldMatrix} class.
diff --git a/src/test/java/org/apache/commons/math4/linear/HessenbergTransformerTest.java b/src/test/java/org/apache/commons/math4/linear/HessenbergTransformerTest.java
index 08f983e..2d73d27 100644
--- a/src/test/java/org/apache/commons/math4/linear/HessenbergTransformerTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/HessenbergTransformerTest.java
@@ -21,10 +21,6 @@
 
 import org.apache.commons.statistics.distribution.ContinuousDistribution;
 import org.apache.commons.statistics.distribution.NormalDistribution;
-import org.apache.commons.math4.linear.HessenbergTransformer;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.RealMatrix;
 import org.apache.commons.rng.simple.RandomSource;
 import org.junit.Test;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/linear/HilbertMatrix.java b/src/test/java/org/apache/commons/math4/linear/HilbertMatrix.java
index 05bffba..b341184 100644
--- a/src/test/java/org/apache/commons/math4/linear/HilbertMatrix.java
+++ b/src/test/java/org/apache/commons/math4/linear/HilbertMatrix.java
@@ -17,9 +17,6 @@
 package org.apache.commons.math4.linear;
 
 import org.apache.commons.math4.exception.DimensionMismatchException;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.RealLinearOperator;
-import org.apache.commons.math4.linear.RealVector;
 
 /** This class implements Hilbert Matrices as {@link RealLinearOperator}. */
 public class HilbertMatrix
diff --git a/src/test/java/org/apache/commons/math4/linear/InverseHilbertMatrix.java b/src/test/java/org/apache/commons/math4/linear/InverseHilbertMatrix.java
index 02692da..a2b908d 100644
--- a/src/test/java/org/apache/commons/math4/linear/InverseHilbertMatrix.java
+++ b/src/test/java/org/apache/commons/math4/linear/InverseHilbertMatrix.java
@@ -17,9 +17,6 @@
 package org.apache.commons.math4.linear;
 
 import org.apache.commons.math4.exception.DimensionMismatchException;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.RealLinearOperator;
-import org.apache.commons.math4.linear.RealVector;
 import org.apache.commons.numbers.combinatorics.BinomialCoefficient;
 
 /**
diff --git a/src/test/java/org/apache/commons/math4/linear/LUDecompositionTest.java b/src/test/java/org/apache/commons/math4/linear/LUDecompositionTest.java
index 0eae9f6..8176a8c 100644
--- a/src/test/java/org/apache/commons/math4/linear/LUDecompositionTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/LUDecompositionTest.java
@@ -17,10 +17,6 @@
 
 package org.apache.commons.math4.linear;
 
-import org.apache.commons.math4.linear.LUDecomposition;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.RealMatrix;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/LUSolverTest.java b/src/test/java/org/apache/commons/math4/linear/LUSolverTest.java
index 23d4a3e..23eb55e 100644
--- a/src/test/java/org/apache/commons/math4/linear/LUSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/LUSolverTest.java
@@ -18,11 +18,6 @@
 package org.apache.commons.math4.linear;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.linear.DecompositionSolver;
-import org.apache.commons.math4.linear.LUDecomposition;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.SingularMatrixException;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/MatrixDimensionMismatchExceptionTest.java b/src/test/java/org/apache/commons/math4/linear/MatrixDimensionMismatchExceptionTest.java
index 7fbd12d..0f18d4c 100644
--- a/src/test/java/org/apache/commons/math4/linear/MatrixDimensionMismatchExceptionTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/MatrixDimensionMismatchExceptionTest.java
@@ -16,7 +16,6 @@
  */
 package org.apache.commons.math4.linear;
 
-import org.apache.commons.math4.linear.MatrixDimensionMismatchException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/MatrixUtilsTest.java b/src/test/java/org/apache/commons/math4/linear/MatrixUtilsTest.java
index 8d595e4..9940c1c 100644
--- a/src/test/java/org/apache/commons/math4/linear/MatrixUtilsTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/MatrixUtilsTest.java
@@ -23,19 +23,6 @@
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.dfp.Dfp;
-import org.apache.commons.math4.linear.Dfp25;
-import org.apache.commons.math4.linear.Array2DRowFieldMatrix;
-import org.apache.commons.math4.linear.Array2DRowRealMatrix;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.BlockRealMatrix;
-import org.apache.commons.math4.linear.DiagonalMatrix;
-import org.apache.commons.math4.linear.FieldMatrix;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.NonSymmetricMatrixException;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.linear.SingularMatrixException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/OpenMapRealMatrixTest.java b/src/test/java/org/apache/commons/math4/linear/OpenMapRealMatrixTest.java
index 5e7c2fb..3cafcf6 100644
--- a/src/test/java/org/apache/commons/math4/linear/OpenMapRealMatrixTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/OpenMapRealMatrixTest.java
@@ -17,7 +17,6 @@
 package org.apache.commons.math4.linear;
 
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
-import org.apache.commons.math4.linear.OpenMapRealMatrix;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/QRDecompositionTest.java b/src/test/java/org/apache/commons/math4/linear/QRDecompositionTest.java
index 6b62df5..bda2b2e 100644
--- a/src/test/java/org/apache/commons/math4/linear/QRDecompositionTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/QRDecompositionTest.java
@@ -19,15 +19,6 @@
 
 import java.util.Random;
 
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.BlockRealMatrix;
-import org.apache.commons.math4.linear.DefaultRealMatrixChangingVisitor;
-import org.apache.commons.math4.linear.DefaultRealMatrixPreservingVisitor;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.QRDecomposition;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.linear.SingularMatrixException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/QRSolverTest.java b/src/test/java/org/apache/commons/math4/linear/QRSolverTest.java
index 1b6fa72..7b8d43b 100644
--- a/src/test/java/org/apache/commons/math4/linear/QRSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/QRSolverTest.java
@@ -20,14 +20,6 @@
 import java.util.Random;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.linear.BlockRealMatrix;
-import org.apache.commons.math4.linear.DecompositionSolver;
-import org.apache.commons.math4.linear.DefaultRealMatrixChangingVisitor;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.QRDecomposition;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.linear.SingularMatrixException;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/RRQRDecompositionTest.java b/src/test/java/org/apache/commons/math4/linear/RRQRDecompositionTest.java
index c2e9c33..568b565 100644
--- a/src/test/java/org/apache/commons/math4/linear/RRQRDecompositionTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/RRQRDecompositionTest.java
@@ -19,14 +19,6 @@
 
 import java.util.Random;
 
-import org.apache.commons.math4.linear.Array2DRowRealMatrix;
-import org.apache.commons.math4.linear.BlockRealMatrix;
-import org.apache.commons.math4.linear.DefaultRealMatrixChangingVisitor;
-import org.apache.commons.math4.linear.DefaultRealMatrixPreservingVisitor;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RRQRDecomposition;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.SingularMatrixException;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/RRQRSolverTest.java b/src/test/java/org/apache/commons/math4/linear/RRQRSolverTest.java
index 6dbd956..f84354f 100644
--- a/src/test/java/org/apache/commons/math4/linear/RRQRSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/RRQRSolverTest.java
@@ -20,14 +20,6 @@
 import java.util.Random;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.linear.BlockRealMatrix;
-import org.apache.commons.math4.linear.DecompositionSolver;
-import org.apache.commons.math4.linear.DefaultRealMatrixChangingVisitor;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RRQRDecomposition;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.linear.SingularMatrixException;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/RealMatrixFormatAbstractTest.java b/src/test/java/org/apache/commons/math4/linear/RealMatrixFormatAbstractTest.java
index 752808e..f413974 100644
--- a/src/test/java/org/apache/commons/math4/linear/RealMatrixFormatAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/RealMatrixFormatAbstractTest.java
@@ -25,9 +25,6 @@
 import org.junit.Test;
 import org.junit.Assert;
 import org.apache.commons.math4.exception.MathParseException;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealMatrixFormat;
 
 public abstract class RealMatrixFormatAbstractTest {
 
diff --git a/src/test/java/org/apache/commons/math4/linear/RealVectorAbstractTest.java b/src/test/java/org/apache/commons/math4/linear/RealVectorAbstractTest.java
index fbc948e..c92835b 100644
--- a/src/test/java/org/apache/commons/math4/linear/RealVectorAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/RealVectorAbstractTest.java
@@ -53,11 +53,6 @@
 import org.apache.commons.math4.exception.NotPositiveException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.linear.OpenMapRealVector;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.linear.RealVectorChangingVisitor;
-import org.apache.commons.math4.linear.RealVectorPreservingVisitor;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/linear/RealVectorFormatAbstractTest.java b/src/test/java/org/apache/commons/math4/linear/RealVectorFormatAbstractTest.java
index 49f117b..b441a6f 100644
--- a/src/test/java/org/apache/commons/math4/linear/RealVectorFormatAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/RealVectorFormatAbstractTest.java
@@ -24,8 +24,6 @@
 import org.junit.Test;
 import org.junit.Assert;
 import org.apache.commons.math4.exception.MathParseException;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.RealVectorFormat;
 
 public abstract class RealVectorFormatAbstractTest {
 
diff --git a/src/test/java/org/apache/commons/math4/linear/RealVectorTest.java b/src/test/java/org/apache/commons/math4/linear/RealVectorTest.java
index f4d46fa..e1095de 100644
--- a/src/test/java/org/apache/commons/math4/linear/RealVectorTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/RealVectorTest.java
@@ -19,7 +19,6 @@
 
 import java.util.Iterator;
 
-import org.apache.commons.math4.linear.RealVector;
 import org.apache.commons.math4.linear.RealVector.Entry;
 import org.junit.Assert;
 import org.junit.Ignore;
diff --git a/src/test/java/org/apache/commons/math4/linear/RectangularCholeskyDecompositionTest.java b/src/test/java/org/apache/commons/math4/linear/RectangularCholeskyDecompositionTest.java
index e1a6eb6..07b31af 100644
--- a/src/test/java/org/apache/commons/math4/linear/RectangularCholeskyDecompositionTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/RectangularCholeskyDecompositionTest.java
@@ -17,9 +17,6 @@
 
 package org.apache.commons.math4.linear;
 
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RectangularCholeskyDecomposition;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/SchurTransformerTest.java b/src/test/java/org/apache/commons/math4/linear/SchurTransformerTest.java
index e086dd3..8d39034 100644
--- a/src/test/java/org/apache/commons/math4/linear/SchurTransformerTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/SchurTransformerTest.java
@@ -21,10 +21,6 @@
 
 import org.apache.commons.statistics.distribution.ContinuousDistribution;
 import org.apache.commons.statistics.distribution.NormalDistribution;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.SchurTransformer;
 import org.apache.commons.rng.simple.RandomSource;
 import org.junit.Test;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/linear/SingularValueDecompositionTest.java b/src/test/java/org/apache/commons/math4/linear/SingularValueDecompositionTest.java
index 2848aa2..b9de72b 100644
--- a/src/test/java/org/apache/commons/math4/linear/SingularValueDecompositionTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/SingularValueDecompositionTest.java
@@ -23,10 +23,6 @@
 import java.io.InputStreamReader;
 import java.util.Random;
 
-import org.apache.commons.math4.linear.Array2DRowRealMatrix;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.SingularValueDecomposition;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/SingularValueSolverTest.java b/src/test/java/org/apache/commons/math4/linear/SingularValueSolverTest.java
index b01332a..9942440 100644
--- a/src/test/java/org/apache/commons/math4/linear/SingularValueSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/SingularValueSolverTest.java
@@ -18,12 +18,6 @@
 package org.apache.commons.math4.linear;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.linear.Array2DRowRealMatrix;
-import org.apache.commons.math4.linear.DecompositionSolver;
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.linear.SingularValueDecomposition;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/SparseFieldMatrixTest.java b/src/test/java/org/apache/commons/math4/linear/SparseFieldMatrixTest.java
index 94c71fc..f975b91 100644
--- a/src/test/java/org/apache/commons/math4/linear/SparseFieldMatrixTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/SparseFieldMatrixTest.java
@@ -25,13 +25,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.exception.OutOfRangeException;
 import org.apache.commons.math4.dfp.Dfp;
-import org.apache.commons.math4.linear.Array2DRowFieldMatrix;
-import org.apache.commons.math4.linear.ArrayFieldVector;
-import org.apache.commons.math4.linear.FieldLUDecomposition;
-import org.apache.commons.math4.linear.FieldMatrix;
-import org.apache.commons.math4.linear.FieldVector;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.SparseFieldMatrix;
 
 /**
  * Test cases for the {@link SparseFieldMatrix} class.
diff --git a/src/test/java/org/apache/commons/math4/linear/SparseFieldVectorTest.java b/src/test/java/org/apache/commons/math4/linear/SparseFieldVectorTest.java
index 232f485..2580ce2 100644
--- a/src/test/java/org/apache/commons/math4/linear/SparseFieldVectorTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/SparseFieldVectorTest.java
@@ -24,11 +24,6 @@
 import org.apache.commons.math4.exception.OutOfRangeException;
 import org.apache.commons.math4.dfp.Dfp;
 import org.apache.commons.math4.dfp.DfpField;
-import org.apache.commons.math4.linear.FieldMatrix;
-import org.apache.commons.math4.linear.FieldVector;
-import org.apache.commons.math4.linear.FieldVectorChangingVisitor;
-import org.apache.commons.math4.linear.FieldVectorPreservingVisitor;
-import org.apache.commons.math4.linear.SparseFieldVector;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/SparseRealMatrixTest.java b/src/test/java/org/apache/commons/math4/linear/SparseRealMatrixTest.java
index 9356927..336fe59 100644
--- a/src/test/java/org/apache/commons/math4/linear/SparseRealMatrixTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/SparseRealMatrixTest.java
@@ -24,13 +24,6 @@
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.BlockRealMatrix;
-import org.apache.commons.math4.linear.LUDecomposition;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.OpenMapRealMatrix;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
 
 /**
  * Test cases for the {@link OpenMapRealMatrix} class.
diff --git a/src/test/java/org/apache/commons/math4/linear/SparseRealVectorTest.java b/src/test/java/org/apache/commons/math4/linear/SparseRealVectorTest.java
index 58491b7..ca9e26b 100644
--- a/src/test/java/org/apache/commons/math4/linear/SparseRealVectorTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/SparseRealVectorTest.java
@@ -37,8 +37,6 @@
 import org.apache.commons.math4.analysis.function.Sqrt;
 import org.apache.commons.math4.analysis.function.Tan;
 import org.apache.commons.math4.analysis.function.Tanh;
-import org.apache.commons.math4.linear.OpenMapRealVector;
-import org.apache.commons.math4.linear.RealVector;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/linear/SymmLQTest.java b/src/test/java/org/apache/commons/math4/linear/SymmLQTest.java
index 75ae635..03e56ae 100644
--- a/src/test/java/org/apache/commons/math4/linear/SymmLQTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/SymmLQTest.java
@@ -19,20 +19,6 @@
 import java.util.Arrays;
 
 import org.apache.commons.math4.exception.DimensionMismatchException;
-import org.apache.commons.math4.linear.Array2DRowRealMatrix;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.DecompositionSolver;
-import org.apache.commons.math4.linear.IterativeLinearSolver;
-import org.apache.commons.math4.linear.IterativeLinearSolverEvent;
-import org.apache.commons.math4.linear.JacobiPreconditioner;
-import org.apache.commons.math4.linear.LUDecomposition;
-import org.apache.commons.math4.linear.NonPositiveDefiniteOperatorException;
-import org.apache.commons.math4.linear.NonSelfAdjointOperatorException;
-import org.apache.commons.math4.linear.NonSquareOperatorException;
-import org.apache.commons.math4.linear.PreconditionedIterativeLinearSolver;
-import org.apache.commons.math4.linear.RealLinearOperator;
-import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.linear.SymmLQ;
 import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.math4.util.IterationEvent;
 import org.apache.commons.math4.util.IterationListener;
diff --git a/src/test/java/org/apache/commons/math4/linear/TriDiagonalTransformerTest.java b/src/test/java/org/apache/commons/math4/linear/TriDiagonalTransformerTest.java
index 65b6d94..352f807 100644
--- a/src/test/java/org/apache/commons/math4/linear/TriDiagonalTransformerTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/TriDiagonalTransformerTest.java
@@ -19,10 +19,6 @@
 
 import java.util.Arrays;
 
-import org.apache.commons.math4.linear.MatrixUtils;
-import org.apache.commons.math4.linear.NonSquareMatrixException;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.TriDiagonalTransformer;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Test;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/linear/UnmodifiableArrayRealVectorTest.java b/src/test/java/org/apache/commons/math4/linear/UnmodifiableArrayRealVectorTest.java
index ef6a697..1b69880 100644
--- a/src/test/java/org/apache/commons/math4/linear/UnmodifiableArrayRealVectorTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/UnmodifiableArrayRealVectorTest.java
@@ -16,9 +16,6 @@
  */
 package org.apache.commons.math4.linear;
 
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.RealVector;
-
 /**
  * This is an implementation of {@link UnmodifiableRealVectorAbstractTest} for
  * unmodifiable views of {@link ArrayRealVectorTest}.
diff --git a/src/test/java/org/apache/commons/math4/linear/UnmodifiableOpenMapRealVectorTest.java b/src/test/java/org/apache/commons/math4/linear/UnmodifiableOpenMapRealVectorTest.java
index 4e67150..f3f8f7e 100644
--- a/src/test/java/org/apache/commons/math4/linear/UnmodifiableOpenMapRealVectorTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/UnmodifiableOpenMapRealVectorTest.java
@@ -17,10 +17,6 @@
 
 package org.apache.commons.math4.linear;
 
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.OpenMapRealVector;
-import org.apache.commons.math4.linear.RealVector;
-
 /**
  * This is an implementation of {@link UnmodifiableRealVectorAbstractTest} for
  * unmodifiable views of {@link OpenMapRealVector}.
diff --git a/src/test/java/org/apache/commons/math4/linear/UnmodifiableRealVectorAbstractTest.java b/src/test/java/org/apache/commons/math4/linear/UnmodifiableRealVectorAbstractTest.java
index 121789e..3864bdf 100644
--- a/src/test/java/org/apache/commons/math4/linear/UnmodifiableRealVectorAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/linear/UnmodifiableRealVectorAbstractTest.java
@@ -26,9 +26,6 @@
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.analysis.function.Sin;
 import org.apache.commons.math4.exception.MathUnsupportedOperationException;
-import org.apache.commons.math4.linear.ArrayRealVector;
-import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.linear.RealVector;
 import org.apache.commons.math4.linear.RealVector.Entry;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/ml/clustering/DBSCANClustererTest.java b/src/test/java/org/apache/commons/math4/ml/clustering/DBSCANClustererTest.java
index e3413a7..d848df3 100644
--- a/src/test/java/org/apache/commons/math4/ml/clustering/DBSCANClustererTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/clustering/DBSCANClustererTest.java
@@ -21,9 +21,6 @@
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NullArgumentException;
-import org.apache.commons.math4.ml.clustering.Cluster;
-import org.apache.commons.math4.ml.clustering.DBSCANClusterer;
-import org.apache.commons.math4.ml.clustering.DoublePoint;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/clustering/FuzzyKMeansClustererTest.java b/src/test/java/org/apache/commons/math4/ml/clustering/FuzzyKMeansClustererTest.java
index 6d16212..04990d4 100644
--- a/src/test/java/org/apache/commons/math4/ml/clustering/FuzzyKMeansClustererTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/clustering/FuzzyKMeansClustererTest.java
@@ -22,10 +22,6 @@
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NullArgumentException;
-import org.apache.commons.math4.ml.clustering.CentroidCluster;
-import org.apache.commons.math4.ml.clustering.Cluster;
-import org.apache.commons.math4.ml.clustering.DoublePoint;
-import org.apache.commons.math4.ml.clustering.FuzzyKMeansClusterer;
 import org.apache.commons.math4.ml.distance.CanberraDistance;
 import org.apache.commons.math4.ml.distance.DistanceMeasure;
 import org.apache.commons.rng.simple.RandomSource;
diff --git a/src/test/java/org/apache/commons/math4/ml/clustering/KMeansPlusPlusClustererTest.java b/src/test/java/org/apache/commons/math4/ml/clustering/KMeansPlusPlusClustererTest.java
index 29f6802..b2f2e0c 100644
--- a/src/test/java/org/apache/commons/math4/ml/clustering/KMeansPlusPlusClustererTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/clustering/KMeansPlusPlusClustererTest.java
@@ -23,10 +23,6 @@
 import java.util.List;
 
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
-import org.apache.commons.math4.ml.clustering.CentroidCluster;
-import org.apache.commons.math4.ml.clustering.Cluster;
-import org.apache.commons.math4.ml.clustering.DoublePoint;
-import org.apache.commons.math4.ml.clustering.KMeansPlusPlusClusterer;
 import org.apache.commons.math4.ml.distance.EuclideanDistance;
 import org.apache.commons.rng.simple.RandomSource;
 import org.apache.commons.rng.UniformRandomProvider;
diff --git a/src/test/java/org/apache/commons/math4/ml/clustering/MultiKMeansPlusPlusClustererTest.java b/src/test/java/org/apache/commons/math4/ml/clustering/MultiKMeansPlusPlusClustererTest.java
index 12816d7..98a7379 100644
--- a/src/test/java/org/apache/commons/math4/ml/clustering/MultiKMeansPlusPlusClustererTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/clustering/MultiKMeansPlusPlusClustererTest.java
@@ -21,11 +21,6 @@
 import java.util.Arrays;
 import java.util.List;
 
-import org.apache.commons.math4.ml.clustering.CentroidCluster;
-import org.apache.commons.math4.ml.clustering.Clusterable;
-import org.apache.commons.math4.ml.clustering.DoublePoint;
-import org.apache.commons.math4.ml.clustering.KMeansPlusPlusClusterer;
-import org.apache.commons.math4.ml.clustering.MultiKMeansPlusPlusClusterer;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/distance/CanberraDistanceTest.java b/src/test/java/org/apache/commons/math4/ml/distance/CanberraDistanceTest.java
index 2096303..1b258c5 100644
--- a/src/test/java/org/apache/commons/math4/ml/distance/CanberraDistanceTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/distance/CanberraDistanceTest.java
@@ -16,8 +16,6 @@
  */
 package org.apache.commons.math4.ml.distance;
 
-import org.apache.commons.math4.ml.distance.CanberraDistance;
-import org.apache.commons.math4.ml.distance.DistanceMeasure;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/distance/ChebyshevDistanceTest.java b/src/test/java/org/apache/commons/math4/ml/distance/ChebyshevDistanceTest.java
index 2132a92..7bc99ba 100644
--- a/src/test/java/org/apache/commons/math4/ml/distance/ChebyshevDistanceTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/distance/ChebyshevDistanceTest.java
@@ -16,8 +16,6 @@
  */
 package org.apache.commons.math4.ml.distance;
 
-import org.apache.commons.math4.ml.distance.ChebyshevDistance;
-import org.apache.commons.math4.ml.distance.DistanceMeasure;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/distance/EarthMoversDistanceTest.java b/src/test/java/org/apache/commons/math4/ml/distance/EarthMoversDistanceTest.java
index 8755e72..049144a 100644
--- a/src/test/java/org/apache/commons/math4/ml/distance/EarthMoversDistanceTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/distance/EarthMoversDistanceTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.ml.distance;
 
 import org.junit.Assert;
-import org.apache.commons.math4.ml.distance.DistanceMeasure;
-import org.apache.commons.math4.ml.distance.EarthMoversDistance;
 import org.junit.Test;
 
 /**
diff --git a/src/test/java/org/apache/commons/math4/ml/distance/EuclideanDistanceTest.java b/src/test/java/org/apache/commons/math4/ml/distance/EuclideanDistanceTest.java
index b55d367..2aaa98f 100644
--- a/src/test/java/org/apache/commons/math4/ml/distance/EuclideanDistanceTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/distance/EuclideanDistanceTest.java
@@ -18,8 +18,6 @@
 
 import org.junit.Assert;
 import org.junit.Test;
-import org.apache.commons.math4.ml.distance.DistanceMeasure;
-import org.apache.commons.math4.ml.distance.EuclideanDistance;
 import org.apache.commons.math4.util.FastMath;
 
 /**
diff --git a/src/test/java/org/apache/commons/math4/ml/distance/ManhattanDistanceTest.java b/src/test/java/org/apache/commons/math4/ml/distance/ManhattanDistanceTest.java
index cf610f3..14deff4 100644
--- a/src/test/java/org/apache/commons/math4/ml/distance/ManhattanDistanceTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/distance/ManhattanDistanceTest.java
@@ -16,8 +16,6 @@
  */
 package org.apache.commons.math4.ml.distance;
 
-import org.apache.commons.math4.ml.distance.DistanceMeasure;
-import org.apache.commons.math4.ml.distance.ManhattanDistance;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/MapRankingTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/MapRankingTest.java
index 7beb2d5..ce3cb31 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/MapRankingTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/MapRankingTest.java
@@ -21,13 +21,7 @@
 import java.util.HashSet;
 import java.util.List;
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
-import org.apache.commons.math4.ml.distance.DistanceMeasure;
 import org.apache.commons.math4.ml.distance.EuclideanDistance;
-import org.apache.commons.math4.ml.neuralnet.FeatureInitializer;
-import org.apache.commons.math4.ml.neuralnet.FeatureInitializerFactory;
-import org.apache.commons.math4.ml.neuralnet.MapUtils;
-import org.apache.commons.math4.ml.neuralnet.Network;
-import org.apache.commons.math4.ml.neuralnet.Neuron;
 import org.apache.commons.math4.ml.neuralnet.oned.NeuronString;
 import org.junit.Test;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/NetworkTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/NetworkTest.java
index 0e34f6b..d2b7401 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/NetworkTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/NetworkTest.java
@@ -25,11 +25,6 @@
 import java.util.Collection;
 import java.util.NoSuchElementException;
 
-import org.apache.commons.math4.ml.neuralnet.FeatureInitializer;
-import org.apache.commons.math4.ml.neuralnet.FeatureInitializerFactory;
-import org.apache.commons.math4.ml.neuralnet.Network;
-import org.apache.commons.math4.ml.neuralnet.Neuron;
-import org.apache.commons.math4.ml.neuralnet.SquareNeighbourhood;
 import org.apache.commons.math4.ml.neuralnet.twod.NeuronSquareMesh2D;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/NeuronTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/NeuronTest.java
index 64f7013..4e0eba9 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/NeuronTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/NeuronTest.java
@@ -23,7 +23,6 @@
 import java.io.ObjectInputStream;
 import java.io.IOException;
 
-import org.apache.commons.math4.ml.neuralnet.Neuron;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/OffsetFeatureInitializer.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/OffsetFeatureInitializer.java
index fb91d80..6425f6d 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/OffsetFeatureInitializer.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/OffsetFeatureInitializer.java
@@ -17,8 +17,6 @@
 
 package org.apache.commons.math4.ml.neuralnet;
 
-import org.apache.commons.math4.ml.neuralnet.FeatureInitializer;
-
 
 /**
  * Wraps a given initializer.
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/oned/NeuronStringTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/oned/NeuronStringTest.java
index dbe5976..eee8ddb 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/oned/NeuronStringTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/oned/NeuronStringTest.java
@@ -29,7 +29,6 @@
 import org.apache.commons.math4.ml.neuralnet.FeatureInitializerFactory;
 import org.apache.commons.math4.ml.neuralnet.Network;
 import org.apache.commons.math4.ml.neuralnet.Neuron;
-import org.apache.commons.math4.ml.neuralnet.oned.NeuronString;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenTrainingTaskTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenTrainingTaskTest.java
index 9e4ea0f..ab55e15 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenTrainingTaskTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenTrainingTaskTest.java
@@ -31,7 +31,6 @@
 
 import org.apache.commons.math4.Retry;
 import org.apache.commons.math4.RetryRunner;
-import org.apache.commons.math4.ml.neuralnet.sofm.KohonenTrainingTask;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenUpdateActionTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenUpdateActionTest.java
index fbd7fc1..955c771 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenUpdateActionTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenUpdateActionTest.java
@@ -27,11 +27,6 @@
 import org.apache.commons.math4.ml.neuralnet.OffsetFeatureInitializer;
 import org.apache.commons.math4.ml.neuralnet.UpdateAction;
 import org.apache.commons.math4.ml.neuralnet.oned.NeuronString;
-import org.apache.commons.math4.ml.neuralnet.sofm.KohonenUpdateAction;
-import org.apache.commons.math4.ml.neuralnet.sofm.LearningFactorFunction;
-import org.apache.commons.math4.ml.neuralnet.sofm.LearningFactorFunctionFactory;
-import org.apache.commons.math4.ml.neuralnet.sofm.NeighbourhoodSizeFunction;
-import org.apache.commons.math4.ml.neuralnet.sofm.NeighbourhoodSizeFunctionFactory;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/LearningFactorFunctionFactoryTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/LearningFactorFunctionFactoryTest.java
index 59eb78d..76a7d48 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/LearningFactorFunctionFactoryTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/LearningFactorFunctionFactoryTest.java
@@ -20,8 +20,6 @@
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.ml.neuralnet.sofm.LearningFactorFunction;
-import org.apache.commons.math4.ml.neuralnet.sofm.LearningFactorFunctionFactory;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/NeighbourhoodSizeFunctionFactoryTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/NeighbourhoodSizeFunctionFactoryTest.java
index 72ffed0..cebe883 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/NeighbourhoodSizeFunctionFactoryTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/NeighbourhoodSizeFunctionFactoryTest.java
@@ -19,8 +19,6 @@
 
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
-import org.apache.commons.math4.ml.neuralnet.sofm.NeighbourhoodSizeFunction;
-import org.apache.commons.math4.ml.neuralnet.sofm.NeighbourhoodSizeFunctionFactory;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/TravellingSalesmanSolver.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/TravellingSalesmanSolver.java
index 31379ba..a5dabef 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/TravellingSalesmanSolver.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/TravellingSalesmanSolver.java
@@ -39,12 +39,6 @@
 import org.apache.commons.math4.ml.neuralnet.Network;
 import org.apache.commons.math4.ml.neuralnet.Neuron;
 import org.apache.commons.math4.ml.neuralnet.oned.NeuronString;
-import org.apache.commons.math4.ml.neuralnet.sofm.KohonenTrainingTask;
-import org.apache.commons.math4.ml.neuralnet.sofm.KohonenUpdateAction;
-import org.apache.commons.math4.ml.neuralnet.sofm.LearningFactorFunction;
-import org.apache.commons.math4.ml.neuralnet.sofm.LearningFactorFunctionFactory;
-import org.apache.commons.math4.ml.neuralnet.sofm.NeighbourhoodSizeFunction;
-import org.apache.commons.math4.ml.neuralnet.sofm.NeighbourhoodSizeFunctionFactory;
 import org.apache.commons.rng.simple.RandomSource;
 import org.apache.commons.rng.UniformRandomProvider;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/util/ExponentialDecayFunctionTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/util/ExponentialDecayFunctionTest.java
index 4c4831e..8b4def8 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/util/ExponentialDecayFunctionTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/util/ExponentialDecayFunctionTest.java
@@ -19,7 +19,6 @@
 
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
-import org.apache.commons.math4.ml.neuralnet.sofm.util.ExponentialDecayFunction;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/util/QuasiSigmoidDecayFunctionTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/util/QuasiSigmoidDecayFunctionTest.java
index e2d8193..499a7b2 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/util/QuasiSigmoidDecayFunctionTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/sofm/util/QuasiSigmoidDecayFunctionTest.java
@@ -19,7 +19,6 @@
 
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
-import org.apache.commons.math4.ml.neuralnet.sofm.util.QuasiSigmoidDecayFunction;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/ml/neuralnet/twod/NeuronSquareMesh2DTest.java b/src/test/java/org/apache/commons/math4/ml/neuralnet/twod/NeuronSquareMesh2DTest.java
index 55732a7..ce8a469 100644
--- a/src/test/java/org/apache/commons/math4/ml/neuralnet/twod/NeuronSquareMesh2DTest.java
+++ b/src/test/java/org/apache/commons/math4/ml/neuralnet/twod/NeuronSquareMesh2DTest.java
@@ -36,7 +36,6 @@
 import org.apache.commons.math4.ml.neuralnet.Network;
 import org.apache.commons.math4.ml.neuralnet.Neuron;
 import org.apache.commons.math4.ml.neuralnet.SquareNeighbourhood;
-import org.apache.commons.math4.ml.neuralnet.twod.NeuronSquareMesh2D;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/ode/ContinuousOutputModelTest.java b/src/test/java/org/apache/commons/math4/ode/ContinuousOutputModelTest.java
index d9d2cb4..5222286 100644
--- a/src/test/java/org/apache/commons/math4/ode/ContinuousOutputModelTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/ContinuousOutputModelTest.java
@@ -24,9 +24,6 @@
 import org.apache.commons.math4.exception.MaxCountExceededException;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
-import org.apache.commons.math4.ode.ContinuousOutputModel;
-import org.apache.commons.math4.ode.FirstOrderDifferentialEquations;
-import org.apache.commons.math4.ode.FirstOrderIntegrator;
 import org.apache.commons.math4.ode.nonstiff.DormandPrince54Integrator;
 import org.apache.commons.math4.ode.nonstiff.DormandPrince853Integrator;
 import org.apache.commons.math4.ode.sampling.DummyStepInterpolator;
diff --git a/src/test/java/org/apache/commons/math4/ode/FieldExpandableODETest.java b/src/test/java/org/apache/commons/math4/ode/FieldExpandableODETest.java
index 6a4e399..bae1aac 100644
--- a/src/test/java/org/apache/commons/math4/ode/FieldExpandableODETest.java
+++ b/src/test/java/org/apache/commons/math4/ode/FieldExpandableODETest.java
@@ -22,10 +22,6 @@
 import org.apache.commons.math4.RealFieldElement;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.ode.FieldExpandableODE;
-import org.apache.commons.math4.ode.FirstOrderFieldDifferentialEquations;
-import org.apache.commons.math4.ode.FieldODEStateAndDerivative;
-import org.apache.commons.math4.ode.FieldSecondaryEquations;
 import org.apache.commons.math4.util.Decimal64Field;
 import org.apache.commons.math4.util.MathArrays;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/ode/FirstOrderConverterTest.java b/src/test/java/org/apache/commons/math4/ode/FirstOrderConverterTest.java
index a22f5c8..0ae0af5 100644
--- a/src/test/java/org/apache/commons/math4/ode/FirstOrderConverterTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/FirstOrderConverterTest.java
@@ -21,8 +21,6 @@
 import org.apache.commons.math4.exception.MaxCountExceededException;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
-import org.apache.commons.math4.ode.FirstOrderConverter;
-import org.apache.commons.math4.ode.SecondOrderDifferentialEquations;
 import org.apache.commons.math4.ode.nonstiff.ClassicalRungeKuttaIntegrator;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/ode/JacobianMatricesTest.java b/src/test/java/org/apache/commons/math4/ode/JacobianMatricesTest.java
index fab7f2a..e9737e0 100644
--- a/src/test/java/org/apache/commons/math4/ode/JacobianMatricesTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/JacobianMatricesTest.java
@@ -21,16 +21,6 @@
 import org.apache.commons.math4.exception.MaxCountExceededException;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
-import org.apache.commons.math4.ode.AbstractIntegrator;
-import org.apache.commons.math4.ode.AbstractParameterizable;
-import org.apache.commons.math4.ode.ExpandableStatefulODE;
-import org.apache.commons.math4.ode.FirstOrderDifferentialEquations;
-import org.apache.commons.math4.ode.FirstOrderIntegrator;
-import org.apache.commons.math4.ode.JacobianMatrices;
-import org.apache.commons.math4.ode.MainStateJacobianProvider;
-import org.apache.commons.math4.ode.ParameterJacobianProvider;
-import org.apache.commons.math4.ode.ParameterizedODE;
-import org.apache.commons.math4.ode.UnknownParameterException;
 import org.apache.commons.math4.ode.JacobianMatrices.MismatchedEquations;
 import org.apache.commons.math4.ode.nonstiff.DormandPrince54Integrator;
 import org.apache.commons.math4.stat.descriptive.SummaryStatistics;
diff --git a/src/test/java/org/apache/commons/math4/ode/TestProblemAbstract.java b/src/test/java/org/apache/commons/math4/ode/TestProblemAbstract.java
index 6b93644..48315b8 100644
--- a/src/test/java/org/apache/commons/math4/ode/TestProblemAbstract.java
+++ b/src/test/java/org/apache/commons/math4/ode/TestProblemAbstract.java
@@ -17,7 +17,6 @@
 
 package org.apache.commons.math4.ode;
 
-import org.apache.commons.math4.ode.FirstOrderDifferentialEquations;
 import org.apache.commons.math4.ode.events.EventHandler;
 
 /**
diff --git a/src/test/java/org/apache/commons/math4/ode/TestProblemHandler.java b/src/test/java/org/apache/commons/math4/ode/TestProblemHandler.java
index 00c40b3..12da822 100644
--- a/src/test/java/org/apache/commons/math4/ode/TestProblemHandler.java
+++ b/src/test/java/org/apache/commons/math4/ode/TestProblemHandler.java
@@ -18,7 +18,6 @@
 package org.apache.commons.math4.ode;
 
 import org.apache.commons.math4.exception.MaxCountExceededException;
-import org.apache.commons.math4.ode.ODEIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/events/EventFilterTest.java b/src/test/java/org/apache/commons/math4/ode/events/EventFilterTest.java
index 69c1497..88364bb 100644
--- a/src/test/java/org/apache/commons/math4/ode/events/EventFilterTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/events/EventFilterTest.java
@@ -23,9 +23,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.FirstOrderDifferentialEquations;
 import org.apache.commons.math4.ode.FirstOrderIntegrator;
-import org.apache.commons.math4.ode.events.EventFilter;
-import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.events.FilterType;
 import org.apache.commons.math4.ode.nonstiff.DormandPrince853Integrator;
 import org.apache.commons.rng.UniformRandomProvider;
 import org.apache.commons.rng.simple.RandomSource;
diff --git a/src/test/java/org/apache/commons/math4/ode/events/EventStateTest.java b/src/test/java/org/apache/commons/math4/ode/events/EventStateTest.java
index edfd5d5..8fcfec8 100644
--- a/src/test/java/org/apache/commons/math4/ode/events/EventStateTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/events/EventStateTest.java
@@ -26,8 +26,6 @@
 import org.apache.commons.math4.ode.ExpandableStatefulODE;
 import org.apache.commons.math4.ode.FirstOrderDifferentialEquations;
 import org.apache.commons.math4.ode.SecondaryEquations;
-import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.events.EventState;
 import org.apache.commons.math4.ode.nonstiff.DormandPrince853Integrator;
 import org.apache.commons.math4.ode.nonstiff.LutherIntegrator;
 import org.apache.commons.math4.ode.sampling.AbstractStepInterpolator;
diff --git a/src/test/java/org/apache/commons/math4/ode/events/OverlappingEventsTest.java b/src/test/java/org/apache/commons/math4/ode/events/OverlappingEventsTest.java
index 7d24ad3..bb0c5d9 100644
--- a/src/test/java/org/apache/commons/math4/ode/events/OverlappingEventsTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/events/OverlappingEventsTest.java
@@ -27,7 +27,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.FirstOrderDifferentialEquations;
 import org.apache.commons.math4.ode.FirstOrderIntegrator;
-import org.apache.commons.math4.ode.events.EventHandler;
 import org.apache.commons.math4.ode.nonstiff.DormandPrince853Integrator;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/ode/events/ReappearingEventTest.java b/src/test/java/org/apache/commons/math4/ode/events/ReappearingEventTest.java
index 84e7b85..42f5c48 100644
--- a/src/test/java/org/apache/commons/math4/ode/events/ReappearingEventTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/events/ReappearingEventTest.java
@@ -27,7 +27,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.FirstOrderDifferentialEquations;
 import org.apache.commons.math4.ode.FirstOrderIntegrator;
-import org.apache.commons.math4.ode.events.EventHandler;
 import org.apache.commons.math4.ode.nonstiff.DormandPrince853Integrator;
 import org.apache.commons.math4.ode.nonstiff.GraggBulirschStoerIntegrator;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/AdamsMoultonIntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/AdamsMoultonIntegratorTest.java
index 23063bf..acf5702 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/AdamsMoultonIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/AdamsMoultonIntegratorTest.java
@@ -33,7 +33,6 @@
 import org.apache.commons.math4.ode.TestProblem6;
 import org.apache.commons.math4.ode.TestProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemHandler;
-import org.apache.commons.math4.ode.nonstiff.AdamsMoultonIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/ClassicalRungeKuttaIntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/ClassicalRungeKuttaIntegratorTest.java
index 8fc5df3..f54e806 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/ClassicalRungeKuttaIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/ClassicalRungeKuttaIntegratorTest.java
@@ -33,8 +33,6 @@
 import org.apache.commons.math4.ode.TestProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.ClassicalRungeKuttaIntegrator;
-import org.apache.commons.math4.ode.nonstiff.RungeKuttaIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/ClassicalRungeKuttaStepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/ClassicalRungeKuttaStepInterpolatorTest.java
index a18c799..707a750 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/ClassicalRungeKuttaStepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/ClassicalRungeKuttaStepInterpolatorTest.java
@@ -31,7 +31,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.ContinuousOutputModel;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.ClassicalRungeKuttaIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince54IntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince54IntegratorTest.java
index 870d5e9..d679a09 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince54IntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince54IntegratorTest.java
@@ -29,9 +29,6 @@
 import org.apache.commons.math4.ode.TestProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.AdaptiveStepsizeIntegrator;
-import org.apache.commons.math4.ode.nonstiff.DormandPrince54Integrator;
-import org.apache.commons.math4.ode.nonstiff.EmbeddedRungeKuttaIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince54StepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince54StepInterpolatorTest.java
index 8fa30ff..617c1f4 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince54StepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince54StepInterpolatorTest.java
@@ -31,7 +31,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.ContinuousOutputModel;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.DormandPrince54Integrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince853IntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince853IntegratorTest.java
index 21bd0c2..a2394f2 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince853IntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince853IntegratorTest.java
@@ -29,8 +29,6 @@
 import org.apache.commons.math4.ode.TestProblem5;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.AdaptiveStepsizeIntegrator;
-import org.apache.commons.math4.ode.nonstiff.DormandPrince853Integrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince853StepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince853StepInterpolatorTest.java
index 3a739ac..2b360d0 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince853StepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/DormandPrince853StepInterpolatorTest.java
@@ -31,7 +31,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.ContinuousOutputModel;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.DormandPrince853Integrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/EulerIntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/EulerIntegratorTest.java
index 1d63340..5f7ac2a 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/EulerIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/EulerIntegratorTest.java
@@ -33,7 +33,6 @@
 import org.apache.commons.math4.ode.TestProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.EulerIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/EulerStepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/EulerStepInterpolatorTest.java
index c2c7692..bdb6e3f 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/EulerStepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/EulerStepInterpolatorTest.java
@@ -33,10 +33,6 @@
 import org.apache.commons.math4.ode.EquationsMapper;
 import org.apache.commons.math4.ode.TestProblem1;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.EulerIntegrator;
-import org.apache.commons.math4.ode.nonstiff.EulerStepInterpolator;
-import org.apache.commons.math4.ode.nonstiff.RungeKuttaIntegrator;
-import org.apache.commons.math4.ode.nonstiff.RungeKuttaStepInterpolator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/GillIntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/GillIntegratorTest.java
index 138fdc4..5417178 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/GillIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/GillIntegratorTest.java
@@ -33,7 +33,6 @@
 import org.apache.commons.math4.ode.TestProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.GillIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/GillStepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/GillStepInterpolatorTest.java
index 3c4dba9..e872a30 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/GillStepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/GillStepInterpolatorTest.java
@@ -31,7 +31,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.ContinuousOutputModel;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.GillIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/GraggBulirschStoerIntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/GraggBulirschStoerIntegratorTest.java
index ae8a8e5..5940ffa 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/GraggBulirschStoerIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/GraggBulirschStoerIntegratorTest.java
@@ -30,8 +30,6 @@
 import org.apache.commons.math4.ode.TestProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.AdaptiveStepsizeIntegrator;
-import org.apache.commons.math4.ode.nonstiff.GraggBulirschStoerIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/GraggBulirschStoerStepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/GraggBulirschStoerStepInterpolatorTest.java
index fa637d2..b500cd2 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/GraggBulirschStoerStepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/GraggBulirschStoerStepInterpolatorTest.java
@@ -31,7 +31,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.ContinuousOutputModel;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.GraggBulirschStoerIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/HighamHall54IntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/HighamHall54IntegratorTest.java
index 1f57bc1..20819c0 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/HighamHall54IntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/HighamHall54IntegratorTest.java
@@ -31,7 +31,6 @@
 import org.apache.commons.math4.ode.TestProblem5;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.HighamHall54Integrator;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/HighamHall54StepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/HighamHall54StepInterpolatorTest.java
index d4d23b4..09894c1 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/HighamHall54StepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/HighamHall54StepInterpolatorTest.java
@@ -31,7 +31,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.ContinuousOutputModel;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.HighamHall54Integrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/LutherIntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/LutherIntegratorTest.java
index cccbe1a..65bea9d 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/LutherIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/LutherIntegratorTest.java
@@ -33,8 +33,6 @@
 import org.apache.commons.math4.ode.TestProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.LutherIntegrator;
-import org.apache.commons.math4.ode.nonstiff.RungeKuttaIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/LutherStepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/LutherStepInterpolatorTest.java
index 3c713d1..da3db14 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/LutherStepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/LutherStepInterpolatorTest.java
@@ -31,7 +31,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.ContinuousOutputModel;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.LutherIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointIntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointIntegratorTest.java
index eb87c03..339f06c 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointIntegratorTest.java
@@ -33,7 +33,6 @@
 import org.apache.commons.math4.ode.TestProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.MidpointIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointStepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointStepInterpolatorTest.java
index 3f3d310..9e62eb6 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointStepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointStepInterpolatorTest.java
@@ -32,7 +32,6 @@
 import org.apache.commons.math4.ode.ContinuousOutputModel;
 import org.apache.commons.math4.ode.TestProblem1;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.MidpointIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/ThreeEighthesIntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/ThreeEighthesIntegratorTest.java
index c81de9a..c7816fd 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/ThreeEighthesIntegratorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/ThreeEighthesIntegratorTest.java
@@ -33,7 +33,6 @@
 import org.apache.commons.math4.ode.TestProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemHandler;
 import org.apache.commons.math4.ode.events.EventHandler;
-import org.apache.commons.math4.ode.nonstiff.ThreeEighthesIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/ThreeEighthesStepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/ThreeEighthesStepInterpolatorTest.java
index a9b47fb..0f57911 100644
--- a/src/test/java/org/apache/commons/math4/ode/nonstiff/ThreeEighthesStepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/ThreeEighthesStepInterpolatorTest.java
@@ -31,7 +31,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.ode.ContinuousOutputModel;
 import org.apache.commons.math4.ode.TestProblem3;
-import org.apache.commons.math4.ode.nonstiff.ThreeEighthesIntegrator;
 import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/ode/sampling/DummyStepInterpolator.java b/src/test/java/org/apache/commons/math4/ode/sampling/DummyStepInterpolator.java
index f2953fc..092e487 100644
--- a/src/test/java/org/apache/commons/math4/ode/sampling/DummyStepInterpolator.java
+++ b/src/test/java/org/apache/commons/math4/ode/sampling/DummyStepInterpolator.java
@@ -22,9 +22,6 @@
 import java.io.ObjectOutput;
 
 import org.apache.commons.math4.ode.EquationsMapper;
-import org.apache.commons.math4.ode.sampling.AbstractStepInterpolator;
-import org.apache.commons.math4.ode.sampling.StepHandler;
-import org.apache.commons.math4.ode.sampling.StepInterpolator;
 
 /** This class is a step interpolator that does nothing.
  *
diff --git a/src/test/java/org/apache/commons/math4/ode/sampling/DummyStepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/sampling/DummyStepInterpolatorTest.java
index 69a1d55..24c3a6f 100644
--- a/src/test/java/org/apache/commons/math4/ode/sampling/DummyStepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/sampling/DummyStepInterpolatorTest.java
@@ -25,7 +25,6 @@
 import java.io.ObjectOutputStream;
 
 import org.apache.commons.math4.exception.MaxCountExceededException;
-import org.apache.commons.math4.ode.sampling.AbstractStepInterpolator;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/ode/sampling/NordsieckStepInterpolatorTest.java b/src/test/java/org/apache/commons/math4/ode/sampling/NordsieckStepInterpolatorTest.java
index 38eac35..d3be278 100644
--- a/src/test/java/org/apache/commons/math4/ode/sampling/NordsieckStepInterpolatorTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/sampling/NordsieckStepInterpolatorTest.java
@@ -33,7 +33,6 @@
 import org.apache.commons.math4.ode.TestProblem1;
 import org.apache.commons.math4.ode.TestProblem3;
 import org.apache.commons.math4.ode.nonstiff.AdamsBashforthIntegrator;
-import org.apache.commons.math4.ode.sampling.StepHandler;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/ode/sampling/StepInterpolatorTestUtils.java b/src/test/java/org/apache/commons/math4/ode/sampling/StepInterpolatorTestUtils.java
index 7a8834d..0b518c0 100644
--- a/src/test/java/org/apache/commons/math4/ode/sampling/StepInterpolatorTestUtils.java
+++ b/src/test/java/org/apache/commons/math4/ode/sampling/StepInterpolatorTestUtils.java
@@ -28,8 +28,6 @@
 import org.apache.commons.math4.ode.FirstOrderIntegrator;
 import org.apache.commons.math4.ode.TestFieldProblemAbstract;
 import org.apache.commons.math4.ode.TestProblemAbstract;
-import org.apache.commons.math4.ode.sampling.StepHandler;
-import org.apache.commons.math4.ode.sampling.StepInterpolator;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/ode/sampling/StepNormalizerOutputTestBase.java b/src/test/java/org/apache/commons/math4/ode/sampling/StepNormalizerOutputTestBase.java
index 682e16c..b0df64c 100644
--- a/src/test/java/org/apache/commons/math4/ode/sampling/StepNormalizerOutputTestBase.java
+++ b/src/test/java/org/apache/commons/math4/ode/sampling/StepNormalizerOutputTestBase.java
@@ -29,10 +29,6 @@
 import org.apache.commons.math4.ode.FirstOrderDifferentialEquations;
 import org.apache.commons.math4.ode.FirstOrderIntegrator;
 import org.apache.commons.math4.ode.nonstiff.GraggBulirschStoerIntegrator;
-import org.apache.commons.math4.ode.sampling.FixedStepHandler;
-import org.apache.commons.math4.ode.sampling.StepNormalizer;
-import org.apache.commons.math4.ode.sampling.StepNormalizerBounds;
-import org.apache.commons.math4.ode.sampling.StepNormalizerMode;
 import org.junit.Test;
 
 /** Base class for step normalizer output tests. */
diff --git a/src/test/java/org/apache/commons/math4/ode/sampling/StepNormalizerTest.java b/src/test/java/org/apache/commons/math4/ode/sampling/StepNormalizerTest.java
index 488ff94..fd96638 100644
--- a/src/test/java/org/apache/commons/math4/ode/sampling/StepNormalizerTest.java
+++ b/src/test/java/org/apache/commons/math4/ode/sampling/StepNormalizerTest.java
@@ -24,8 +24,6 @@
 import org.apache.commons.math4.ode.FirstOrderIntegrator;
 import org.apache.commons.math4.ode.TestProblem3;
 import org.apache.commons.math4.ode.nonstiff.DormandPrince54Integrator;
-import org.apache.commons.math4.ode.sampling.FixedStepHandler;
-import org.apache.commons.math4.ode.sampling.StepNormalizer;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.After;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/optim/PointValuePairTest.java b/src/test/java/org/apache/commons/math4/optim/PointValuePairTest.java
index c070d00..ae81d1b 100644
--- a/src/test/java/org/apache/commons/math4/optim/PointValuePairTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/PointValuePairTest.java
@@ -17,7 +17,6 @@
 package org.apache.commons.math4.optim;
 
 import org.apache.commons.math4.TestUtils;
-import org.apache.commons.math4.optim.PointValuePair;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/optim/PointVectorValuePairTest.java b/src/test/java/org/apache/commons/math4/optim/PointVectorValuePairTest.java
index 534ce07..4946d29 100644
--- a/src/test/java/org/apache/commons/math4/optim/PointVectorValuePairTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/PointVectorValuePairTest.java
@@ -18,7 +18,6 @@
 package org.apache.commons.math4.optim;
 
 import org.apache.commons.math4.TestUtils;
-import org.apache.commons.math4.optim.PointVectorValuePair;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/optim/SimplePointCheckerTest.java b/src/test/java/org/apache/commons/math4/optim/SimplePointCheckerTest.java
index 262bb60..1492dbc 100644
--- a/src/test/java/org/apache/commons/math4/optim/SimplePointCheckerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/SimplePointCheckerTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.optim;
 
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
-import org.apache.commons.math4.optim.PointValuePair;
-import org.apache.commons.math4.optim.SimplePointChecker;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/optim/SimpleValueCheckerTest.java b/src/test/java/org/apache/commons/math4/optim/SimpleValueCheckerTest.java
index 5ba4aab..67e9763 100644
--- a/src/test/java/org/apache/commons/math4/optim/SimpleValueCheckerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/SimpleValueCheckerTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.optim;
 
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
-import org.apache.commons.math4.optim.PointValuePair;
-import org.apache.commons.math4.optim.SimpleValueChecker;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/optim/SimpleVectorValueCheckerTest.java b/src/test/java/org/apache/commons/math4/optim/SimpleVectorValueCheckerTest.java
index 3704da7..f467b17 100644
--- a/src/test/java/org/apache/commons/math4/optim/SimpleVectorValueCheckerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/SimpleVectorValueCheckerTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.optim;
 
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
-import org.apache.commons.math4.optim.PointVectorValuePair;
-import org.apache.commons.math4.optim.SimpleVectorValueChecker;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultiStartMultivariateOptimizerTest.java b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultiStartMultivariateOptimizerTest.java
index 1ac321d..45b1b76 100644
--- a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultiStartMultivariateOptimizerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultiStartMultivariateOptimizerTest.java
@@ -22,10 +22,6 @@
 import org.apache.commons.math4.optim.MaxEval;
 import org.apache.commons.math4.optim.PointValuePair;
 import org.apache.commons.math4.optim.SimpleValueChecker;
-import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
-import org.apache.commons.math4.optim.nonlinear.scalar.GradientMultivariateOptimizer;
-import org.apache.commons.math4.optim.nonlinear.scalar.MultiStartMultivariateOptimizer;
-import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunction;
 import org.apache.commons.math4.optim.nonlinear.scalar.gradient.CircleScalar;
 import org.apache.commons.math4.optim.nonlinear.scalar.gradient.NonLinearConjugateGradientOptimizer;
 import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.NelderMeadSimplex;
diff --git a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultivariateFunctionMappingAdapterTest.java b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultivariateFunctionMappingAdapterTest.java
index 3335ec5..5f61ee5 100644
--- a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultivariateFunctionMappingAdapterTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultivariateFunctionMappingAdapterTest.java
@@ -20,9 +20,6 @@
 import org.apache.commons.math4.optim.InitialGuess;
 import org.apache.commons.math4.optim.MaxEval;
 import org.apache.commons.math4.optim.PointValuePair;
-import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
-import org.apache.commons.math4.optim.nonlinear.scalar.MultivariateFunctionMappingAdapter;
-import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunction;
 import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.AbstractSimplex;
 import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.NelderMeadSimplex;
 import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.SimplexOptimizer;
diff --git a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultivariateFunctionPenaltyAdapterTest.java b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultivariateFunctionPenaltyAdapterTest.java
index 79d1ece..1e58cbe 100644
--- a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultivariateFunctionPenaltyAdapterTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/MultivariateFunctionPenaltyAdapterTest.java
@@ -21,9 +21,6 @@
 import org.apache.commons.math4.optim.MaxEval;
 import org.apache.commons.math4.optim.PointValuePair;
 import org.apache.commons.math4.optim.SimplePointChecker;
-import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
-import org.apache.commons.math4.optim.nonlinear.scalar.MultivariateFunctionPenaltyAdapter;
-import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunction;
 import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.AbstractSimplex;
 import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.NelderMeadSimplex;
 import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.SimplexOptimizer;
diff --git a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/gradient/NonLinearConjugateGradientOptimizerTest.java b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/gradient/NonLinearConjugateGradientOptimizerTest.java
index 6c5a151..d4be9fb 100644
--- a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/gradient/NonLinearConjugateGradientOptimizerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/gradient/NonLinearConjugateGradientOptimizerTest.java
@@ -31,8 +31,6 @@
 import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
 import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunction;
 import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunctionGradient;
-import org.apache.commons.math4.optim.nonlinear.scalar.gradient.NonLinearConjugateGradientOptimizer;
-import org.apache.commons.math4.optim.nonlinear.scalar.gradient.Preconditioner;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/BOBYQAOptimizerTest.java b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/BOBYQAOptimizerTest.java
index 6aae6a3..72efc40 100644
--- a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/BOBYQAOptimizerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/BOBYQAOptimizerTest.java
@@ -16,9 +16,6 @@
  */
 package org.apache.commons.math4.optim.nonlinear.scalar.noderiv;
 
-import java.util.Arrays;
-import java.util.Random;
-
 import org.apache.commons.math4.analysis.MultivariateFunction;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
@@ -30,8 +27,6 @@
 import org.apache.commons.math4.optim.SimpleBounds;
 import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
 import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunction;
-import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.BOBYQAOptimizer;
-import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/CMAESOptimizerTest.java b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/CMAESOptimizerTest.java
index d7fb53d..bcee8f5 100644
--- a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/CMAESOptimizerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/CMAESOptimizerTest.java
@@ -33,7 +33,6 @@
 import org.apache.commons.math4.optim.SimpleBounds;
 import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
 import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunction;
-import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.CMAESOptimizer;
 import org.apache.commons.rng.simple.RandomSource;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/PowellOptimizerTest.java b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/PowellOptimizerTest.java
index 1f4bfa4..5b4f119 100644
--- a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/PowellOptimizerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/PowellOptimizerTest.java
@@ -25,7 +25,6 @@
 import org.apache.commons.math4.optim.SimpleBounds;
 import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
 import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunction;
-import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.PowellOptimizer;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/SimplexOptimizerMultiDirectionalTest.java b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/SimplexOptimizerMultiDirectionalTest.java
index b3f4b58..512702e 100644
--- a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/SimplexOptimizerMultiDirectionalTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/SimplexOptimizerMultiDirectionalTest.java
@@ -26,10 +26,6 @@
 import org.apache.commons.math4.optim.SimpleValueChecker;
 import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
 import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunction;
-import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.MultiDirectionalSimplex;
-import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.NelderMeadSimplex;
-import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.SimplexOptimizer;
-import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.math4.util.MathArrays;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/SimplexOptimizerNelderMeadTest.java b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/SimplexOptimizerNelderMeadTest.java
index 921f69b..3ca7c83 100644
--- a/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/SimplexOptimizerNelderMeadTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/nonlinear/scalar/noderiv/SimplexOptimizerNelderMeadTest.java
@@ -31,9 +31,6 @@
 import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
 import org.apache.commons.math4.optim.nonlinear.scalar.LeastSquaresConverter;
 import org.apache.commons.math4.optim.nonlinear.scalar.ObjectiveFunction;
-import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.NelderMeadSimplex;
-import org.apache.commons.math4.optim.nonlinear.scalar.noderiv.SimplexOptimizer;
-import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.math4.util.MathArrays;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/optim/univariate/BracketFinderTest.java b/src/test/java/org/apache/commons/math4/optim/univariate/BracketFinderTest.java
index b2ea791..9017bb2 100644
--- a/src/test/java/org/apache/commons/math4/optim/univariate/BracketFinderTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/univariate/BracketFinderTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.analysis.UnivariateFunction;
 import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
-import org.apache.commons.math4.optim.univariate.BracketFinder;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/optim/univariate/BrentOptimizerTest.java b/src/test/java/org/apache/commons/math4/optim/univariate/BrentOptimizerTest.java
index dde5a95..94d785d 100644
--- a/src/test/java/org/apache/commons/math4/optim/univariate/BrentOptimizerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/univariate/BrentOptimizerTest.java
@@ -28,12 +28,6 @@
 import org.apache.commons.math4.optim.ConvergenceChecker;
 import org.apache.commons.math4.optim.MaxEval;
 import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
-import org.apache.commons.math4.optim.univariate.BrentOptimizer;
-import org.apache.commons.math4.optim.univariate.SearchInterval;
-import org.apache.commons.math4.optim.univariate.SimpleUnivariateValueChecker;
-import org.apache.commons.math4.optim.univariate.UnivariateObjectiveFunction;
-import org.apache.commons.math4.optim.univariate.UnivariateOptimizer;
-import org.apache.commons.math4.optim.univariate.UnivariatePointValuePair;
 import org.apache.commons.math4.stat.descriptive.DescriptiveStatistics;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/optim/univariate/MultiStartUnivariateOptimizerTest.java b/src/test/java/org/apache/commons/math4/optim/univariate/MultiStartUnivariateOptimizerTest.java
index 94cdecc..18781e7 100644
--- a/src/test/java/org/apache/commons/math4/optim/univariate/MultiStartUnivariateOptimizerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/univariate/MultiStartUnivariateOptimizerTest.java
@@ -22,12 +22,6 @@
 import org.apache.commons.math4.exception.MathIllegalStateException;
 import org.apache.commons.math4.optim.MaxEval;
 import org.apache.commons.math4.optim.nonlinear.scalar.GoalType;
-import org.apache.commons.math4.optim.univariate.BrentOptimizer;
-import org.apache.commons.math4.optim.univariate.MultiStartUnivariateOptimizer;
-import org.apache.commons.math4.optim.univariate.SearchInterval;
-import org.apache.commons.math4.optim.univariate.UnivariateObjectiveFunction;
-import org.apache.commons.math4.optim.univariate.UnivariateOptimizer;
-import org.apache.commons.math4.optim.univariate.UnivariatePointValuePair;
 import org.apache.commons.rng.UniformRandomProvider;
 import org.apache.commons.rng.simple.RandomSource;
 import org.apache.commons.math4.util.FastMath;
diff --git a/src/test/java/org/apache/commons/math4/optim/univariate/SimpleUnivariateValueCheckerTest.java b/src/test/java/org/apache/commons/math4/optim/univariate/SimpleUnivariateValueCheckerTest.java
index a515b06..1fe044a 100644
--- a/src/test/java/org/apache/commons/math4/optim/univariate/SimpleUnivariateValueCheckerTest.java
+++ b/src/test/java/org/apache/commons/math4/optim/univariate/SimpleUnivariateValueCheckerTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.optim.univariate;
 
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
-import org.apache.commons.math4.optim.univariate.SimpleUnivariateValueChecker;
-import org.apache.commons.math4.optim.univariate.UnivariatePointValuePair;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/random/CorrelatedRandomVectorGeneratorTest.java b/src/test/java/org/apache/commons/math4/random/CorrelatedRandomVectorGeneratorTest.java
index 925758e..00ac71f 100644
--- a/src/test/java/org/apache/commons/math4/random/CorrelatedRandomVectorGeneratorTest.java
+++ b/src/test/java/org/apache/commons/math4/random/CorrelatedRandomVectorGeneratorTest.java
@@ -23,9 +23,6 @@
 import org.apache.commons.math4.linear.Array2DRowRealMatrix;
 import org.apache.commons.math4.linear.MatrixUtils;
 import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.random.CorrelatedRandomVectorGenerator;
-import org.apache.commons.math4.random.GaussianRandomGenerator;
-import org.apache.commons.math4.random.NormalizedRandomGenerator;
 import org.apache.commons.rng.simple.RandomSource;
 import org.apache.commons.math4.stat.correlation.StorelessCovariance;
 import org.apache.commons.math4.stat.descriptive.moment.VectorialCovariance;
diff --git a/src/test/java/org/apache/commons/math4/random/GaussianRandomGeneratorTest.java b/src/test/java/org/apache/commons/math4/random/GaussianRandomGeneratorTest.java
index 34ad0d5..6e92644 100644
--- a/src/test/java/org/apache/commons/math4/random/GaussianRandomGeneratorTest.java
+++ b/src/test/java/org/apache/commons/math4/random/GaussianRandomGeneratorTest.java
@@ -17,7 +17,6 @@
 
 package org.apache.commons.math4.random;
 
-import org.apache.commons.math4.random.GaussianRandomGenerator;
 import org.apache.commons.rng.simple.RandomSource;
 import org.apache.commons.math4.stat.StatUtils;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/random/HaltonSequenceGeneratorTest.java b/src/test/java/org/apache/commons/math4/random/HaltonSequenceGeneratorTest.java
index f7ed491..b73e5a3 100644
--- a/src/test/java/org/apache/commons/math4/random/HaltonSequenceGeneratorTest.java
+++ b/src/test/java/org/apache/commons/math4/random/HaltonSequenceGeneratorTest.java
@@ -20,7 +20,6 @@
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.random.HaltonSequenceGenerator;
 import org.junit.Before;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/random/SobolSequenceGeneratorTest.java b/src/test/java/org/apache/commons/math4/random/SobolSequenceGeneratorTest.java
index 70b05b5..ec1fce5 100644
--- a/src/test/java/org/apache/commons/math4/random/SobolSequenceGeneratorTest.java
+++ b/src/test/java/org/apache/commons/math4/random/SobolSequenceGeneratorTest.java
@@ -21,7 +21,6 @@
 import java.io.InputStream;
 
 import org.apache.commons.math4.exception.OutOfRangeException;
-import org.apache.commons.math4.random.SobolSequenceGenerator;
 import org.junit.Before;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/random/UncorrelatedRandomVectorGeneratorTest.java b/src/test/java/org/apache/commons/math4/random/UncorrelatedRandomVectorGeneratorTest.java
index 19da6d3..a15cdaf 100644
--- a/src/test/java/org/apache/commons/math4/random/UncorrelatedRandomVectorGeneratorTest.java
+++ b/src/test/java/org/apache/commons/math4/random/UncorrelatedRandomVectorGeneratorTest.java
@@ -19,8 +19,6 @@
 
 import org.apache.commons.math4.linear.RealMatrix;
 import org.apache.commons.rng.simple.RandomSource;
-import org.apache.commons.math4.random.GaussianRandomGenerator;
-import org.apache.commons.math4.random.UncorrelatedRandomVectorGenerator;
 import org.apache.commons.math4.stat.descriptive.moment.VectorialCovariance;
 import org.apache.commons.math4.stat.descriptive.moment.VectorialMean;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/special/BesselJTest.java b/src/test/java/org/apache/commons/math4/special/BesselJTest.java
index 80f8657..e23c3d9 100644
--- a/src/test/java/org/apache/commons/math4/special/BesselJTest.java
+++ b/src/test/java/org/apache/commons/math4/special/BesselJTest.java
@@ -17,7 +17,6 @@
 package org.apache.commons.math4.special;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.special.BesselJ;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/StatUtilsTest.java b/src/test/java/org/apache/commons/math4/stat/StatUtilsTest.java
index d10c8f4..dad6cd5 100644
--- a/src/test/java/org/apache/commons/math4/stat/StatUtilsTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/StatUtilsTest.java
@@ -20,7 +20,6 @@
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NullArgumentException;
-import org.apache.commons.math4.stat.StatUtils;
 import org.apache.commons.math4.stat.descriptive.DescriptiveStatistics;
 import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.numbers.core.Precision;
diff --git a/src/test/java/org/apache/commons/math4/stat/correlation/CovarianceTest.java b/src/test/java/org/apache/commons/math4/stat/correlation/CovarianceTest.java
index b9cdf7b..9ba1be7 100644
--- a/src/test/java/org/apache/commons/math4/stat/correlation/CovarianceTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/correlation/CovarianceTest.java
@@ -21,7 +21,6 @@
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.linear.Array2DRowRealMatrix;
 import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.stat.correlation.Covariance;
 import org.apache.commons.math4.stat.descriptive.moment.Variance;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/correlation/KendallsCorrelationTest.java b/src/test/java/org/apache/commons/math4/stat/correlation/KendallsCorrelationTest.java
index 715415b..9531abc 100644
--- a/src/test/java/org/apache/commons/math4/stat/correlation/KendallsCorrelationTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/correlation/KendallsCorrelationTest.java
@@ -23,7 +23,6 @@
 import org.apache.commons.math4.linear.RealMatrix;
 import org.apache.commons.rng.UniformRandomProvider;
 import org.apache.commons.rng.simple.RandomSource;
-import org.apache.commons.math4.stat.correlation.KendallsCorrelation;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/correlation/PearsonsCorrelationTest.java b/src/test/java/org/apache/commons/math4/stat/correlation/PearsonsCorrelationTest.java
index 9dcf09e..ba1f33e 100644
--- a/src/test/java/org/apache/commons/math4/stat/correlation/PearsonsCorrelationTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/correlation/PearsonsCorrelationTest.java
@@ -21,8 +21,6 @@
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.linear.BlockRealMatrix;
 import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.stat.correlation.Covariance;
-import org.apache.commons.math4.stat.correlation.PearsonsCorrelation;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/correlation/SpearmansRankCorrelationTest.java b/src/test/java/org/apache/commons/math4/stat/correlation/SpearmansRankCorrelationTest.java
index 0e25f8b..8937267 100644
--- a/src/test/java/org/apache/commons/math4/stat/correlation/SpearmansRankCorrelationTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/correlation/SpearmansRankCorrelationTest.java
@@ -21,7 +21,6 @@
 import org.apache.commons.math4.linear.BlockRealMatrix;
 import org.apache.commons.math4.linear.MatrixUtils;
 import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.stat.correlation.SpearmansCorrelation;
 import org.apache.commons.math4.stat.ranking.NaNStrategy;
 import org.apache.commons.math4.stat.ranking.NaturalRanking;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/stat/correlation/StorelessCovarianceTest.java b/src/test/java/org/apache/commons/math4/stat/correlation/StorelessCovarianceTest.java
index 8e6bc13..8088e66 100644
--- a/src/test/java/org/apache/commons/math4/stat/correlation/StorelessCovarianceTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/correlation/StorelessCovarianceTest.java
@@ -21,8 +21,6 @@
 import org.apache.commons.math4.linear.RealMatrix;
 import org.apache.commons.rng.UniformRandomProvider;
 import org.apache.commons.rng.simple.RandomSource;
-import org.apache.commons.math4.stat.correlation.StorelessBivariateCovariance;
-import org.apache.commons.math4.stat.correlation.StorelessCovariance;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/DescriptiveStatisticsTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/DescriptiveStatisticsTest.java
index 33dcf0f..8dec6ff 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/DescriptiveStatisticsTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/DescriptiveStatisticsTest.java
@@ -17,9 +17,6 @@
 
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.stat.descriptive.DescriptiveStatistics;
-import org.apache.commons.math4.stat.descriptive.SummaryStatistics;
-import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
 import org.apache.commons.math4.stat.descriptive.moment.GeometricMean;
 import org.apache.commons.math4.stat.descriptive.moment.Mean;
 import org.apache.commons.math4.stat.descriptive.moment.Variance;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/ListUnivariateImpl.java b/src/test/java/org/apache/commons/math4/stat/descriptive/ListUnivariateImpl.java
index 3dfeda1..57489f7 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/ListUnivariateImpl.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/ListUnivariateImpl.java
@@ -21,8 +21,6 @@
 import java.util.List;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.stat.descriptive.DescriptiveStatistics;
-import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
 import org.apache.commons.math4.util.DefaultTransformer;
 import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.math4.util.NumberTransformer;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/ListUnivariateImplTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/ListUnivariateImplTest.java
index 2e22fc3..e1e07ee 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/ListUnivariateImplTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/ListUnivariateImplTest.java
@@ -20,7 +20,6 @@
 import java.util.List;
 
 import org.apache.commons.math4.TestUtils;
-import org.apache.commons.math4.stat.descriptive.DescriptiveStatistics;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/MixedListUnivariateImplTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/MixedListUnivariateImplTest.java
index 7d3ab04..5308bfe 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/MixedListUnivariateImplTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/MixedListUnivariateImplTest.java
@@ -20,7 +20,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.commons.math4.stat.descriptive.DescriptiveStatistics;
 import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.math4.util.NumberTransformer;
 import org.apache.commons.math4.util.TransformerMap;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/MultivariateSummaryStatisticsTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/MultivariateSummaryStatisticsTest.java
index d198644..a9930d0 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/MultivariateSummaryStatisticsTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/MultivariateSummaryStatisticsTest.java
@@ -22,8 +22,6 @@
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.exception.MathIllegalStateException;
-import org.apache.commons.math4.stat.descriptive.MultivariateSummaryStatistics;
-import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatistic;
 import org.apache.commons.math4.stat.descriptive.moment.Mean;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/StatisticalSummaryValuesTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/StatisticalSummaryValuesTest.java
index 0917ba7..eb58373 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/StatisticalSummaryValuesTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/StatisticalSummaryValuesTest.java
@@ -20,7 +20,6 @@
 import java.util.Locale;
 
 import org.apache.commons.math4.TestUtils;
-import org.apache.commons.math4.stat.descriptive.StatisticalSummaryValues;
 import org.junit.Assert;
 import org.junit.Test;
 /**
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/StorelessUnivariateStatisticAbstractTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/StorelessUnivariateStatisticAbstractTest.java
index c942faf..6bfebb5 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/StorelessUnivariateStatisticAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/StorelessUnivariateStatisticAbstractTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.stat.descriptive;
 
 import org.apache.commons.math4.TestUtils;
-import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
 import org.apache.commons.math4.stat.descriptive.moment.SecondMoment;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/SummaryStatisticsTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/SummaryStatisticsTest.java
index bdf1f38..5bba3c1 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/SummaryStatisticsTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/SummaryStatisticsTest.java
@@ -19,8 +19,6 @@
 
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.MathIllegalStateException;
-import org.apache.commons.math4.stat.descriptive.StatisticalSummary;
-import org.apache.commons.math4.stat.descriptive.SummaryStatistics;
 import org.apache.commons.math4.stat.descriptive.moment.GeometricMean;
 import org.apache.commons.math4.stat.descriptive.moment.Mean;
 import org.apache.commons.math4.stat.descriptive.moment.Variance;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedDescriptiveStatisticsTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedDescriptiveStatisticsTest.java
index 528516f..ed2f82b 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedDescriptiveStatisticsTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedDescriptiveStatisticsTest.java
@@ -13,9 +13,6 @@
  */
 package org.apache.commons.math4.stat.descriptive;
 
-import org.apache.commons.math4.stat.descriptive.DescriptiveStatistics;
-import org.apache.commons.math4.stat.descriptive.SynchronizedDescriptiveStatistics;
-
 
 /**
  * Test cases for the {@link SynchronizedDescriptiveStatisticsTest} class.
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedMultivariateSummaryStatisticsTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedMultivariateSummaryStatisticsTest.java
index f674b18..8b32fe4 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedMultivariateSummaryStatisticsTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedMultivariateSummaryStatisticsTest.java
@@ -13,9 +13,6 @@
  */
 package org.apache.commons.math4.stat.descriptive;
 
-import org.apache.commons.math4.stat.descriptive.MultivariateSummaryStatistics;
-import org.apache.commons.math4.stat.descriptive.SynchronizedMultivariateSummaryStatistics;
-
 
 /**
  * Test cases for the {@link SynchronizedMultivariateSummaryStatisticsTest} class.
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedSummaryStatisticsTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedSummaryStatisticsTest.java
index 30fd09e..4b5ab8b 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedSummaryStatisticsTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/SynchronizedSummaryStatisticsTest.java
@@ -13,9 +13,6 @@
  */
 package org.apache.commons.math4.stat.descriptive;
 
-import org.apache.commons.math4.stat.descriptive.SummaryStatistics;
-import org.apache.commons.math4.stat.descriptive.SynchronizedSummaryStatistics;
-
 /**
  * Test cases for the {@link SynchronizedSummaryStatisticsTest} class.
  *          2007) $
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/UnivariateStatisticAbstractTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/UnivariateStatisticAbstractTest.java
index f837bf9..da81d53 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/UnivariateStatisticAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/UnivariateStatisticAbstractTest.java
@@ -24,8 +24,6 @@
 import org.apache.commons.statistics.distribution.NormalDistribution;
 import org.apache.commons.statistics.distribution.ContinuousDistribution;
 import org.apache.commons.statistics.distribution.UniformDiscreteDistribution;
-import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.WeightedEvaluation;
 import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.rng.simple.RandomSource;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/FirstMomentTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/FirstMomentTest.java
index ca0566f..09fd017 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/FirstMomentTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/FirstMomentTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.FirstMoment;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/FourthMomentTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/FourthMomentTest.java
index a3b51c8..943b23f 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/FourthMomentTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/FourthMomentTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.FourthMoment;
 
 /**
  * Test cases for the {@link FourthMoment} class.
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/GeometricMeanTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/GeometricMeanTest.java
index b8462a9..03b2248 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/GeometricMeanTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/GeometricMeanTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.GeometricMean;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/InteractionTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/InteractionTest.java
index 3d168cb..abb1495 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/InteractionTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/InteractionTest.java
@@ -16,11 +16,6 @@
  */
 package org.apache.commons.math4.stat.descriptive.moment;
 
-import org.apache.commons.math4.stat.descriptive.moment.FourthMoment;
-import org.apache.commons.math4.stat.descriptive.moment.Kurtosis;
-import org.apache.commons.math4.stat.descriptive.moment.Mean;
-import org.apache.commons.math4.stat.descriptive.moment.Skewness;
-import org.apache.commons.math4.stat.descriptive.moment.Variance;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/KurtosisTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/KurtosisTest.java
index 288aa65..b33af64 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/KurtosisTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/KurtosisTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.Kurtosis;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/MeanTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/MeanTest.java
index 6f95f75..62b0e05 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/MeanTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/MeanTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.Mean;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SecondMomentTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SecondMomentTest.java
index e42b2a0..35fa1c4 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SecondMomentTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SecondMomentTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.SecondMoment;
 
 /**
  * Test cases for the {@link SecondMoment} class.
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SemiVarianceTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SemiVarianceTest.java
index c964a78..532111e 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SemiVarianceTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SemiVarianceTest.java
@@ -20,7 +20,6 @@
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.stat.StatUtils;
-import org.apache.commons.math4.stat.descriptive.moment.SemiVariance;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SkewnessTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SkewnessTest.java
index 5911c01..5d863d8 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SkewnessTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/SkewnessTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.Skewness;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/StandardDeviationTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/StandardDeviationTest.java
index b29138f..efcff3b 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/StandardDeviationTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/StandardDeviationTest.java
@@ -18,9 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.Mean;
-import org.apache.commons.math4.stat.descriptive.moment.SecondMoment;
-import org.apache.commons.math4.stat.descriptive.moment.StandardDeviation;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/ThirdMomentTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/ThirdMomentTest.java
index 098dcfc..5288934 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/ThirdMomentTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/ThirdMomentTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.ThirdMoment;
 
 /**
  * Test cases for the {@link ThirdMoment} class.
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VarianceTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VarianceTest.java
index fc5644c..2e1a343 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VarianceTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VarianceTest.java
@@ -18,10 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.moment.Mean;
-import org.apache.commons.math4.stat.descriptive.moment.SecondMoment;
-import org.apache.commons.math4.stat.descriptive.moment.StandardDeviation;
-import org.apache.commons.math4.stat.descriptive.moment.Variance;
 import org.apache.commons.math4.util.MathArrays;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VectorialCovarianceTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VectorialCovarianceTest.java
index 3d2bbb6..125e45f 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VectorialCovarianceTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VectorialCovarianceTest.java
@@ -20,7 +20,6 @@
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.DimensionMismatchException;
 import org.apache.commons.math4.linear.RealMatrix;
-import org.apache.commons.math4.stat.descriptive.moment.VectorialCovariance;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VectorialMeanTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VectorialMeanTest.java
index 41d43e7..fcba73a 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VectorialMeanTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/moment/VectorialMeanTest.java
@@ -19,7 +19,6 @@
 
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.DimensionMismatchException;
-import org.apache.commons.math4.stat.descriptive.moment.VectorialMean;
 import org.junit.Test;
 import org.junit.Assert;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MaxTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MaxTest.java
index 57363d5..fc34d1e 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MaxTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MaxTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.rank.Max;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MedianTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MedianTest.java
index 6144b58..d824183 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MedianTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MedianTest.java
@@ -29,7 +29,6 @@
 
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatisticAbstractTest;
-import org.apache.commons.math4.stat.descriptive.rank.Median;
 import org.apache.commons.math4.stat.descriptive.rank.Percentile.EstimationType;
 import org.apache.commons.math4.stat.ranking.NaNStrategy;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MinTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MinTest.java
index 7ce8ee3..b934df5 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MinTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/rank/MinTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.rank.Min;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/rank/PSquarePercentileTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/rank/PSquarePercentileTest.java
index b15499b..5bab2b4 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/rank/PSquarePercentileTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/rank/PSquarePercentileTest.java
@@ -36,8 +36,6 @@
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatistic;
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.rank.PSquarePercentile;
-import org.apache.commons.math4.stat.descriptive.rank.Percentile;
 import org.apache.commons.math4.stat.descriptive.rank.PSquarePercentile.PSquareMarkers;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/summary/ProductTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/summary/ProductTest.java
index bc65e12..6a0a19c 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/summary/ProductTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/summary/ProductTest.java
@@ -19,7 +19,6 @@
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatistic;
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.summary.Product;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumLogTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumLogTest.java
index 1696dff..01d7c26 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumLogTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumLogTest.java
@@ -19,7 +19,6 @@
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatistic;
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.summary.SumOfLogs;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumSqTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumSqTest.java
index 1f278c6..f6e7620 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumSqTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumSqTest.java
@@ -19,7 +19,6 @@
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatistic;
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.summary.SumOfSquares;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumTest.java b/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumTest.java
index 88e509d..c7ffa0e 100644
--- a/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/descriptive/summary/SumTest.java
@@ -19,7 +19,6 @@
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatistic;
 import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
 import org.apache.commons.math4.stat.descriptive.UnivariateStatistic;
-import org.apache.commons.math4.stat.descriptive.summary.Sum;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/inference/BinomialTestTest.java b/src/test/java/org/apache/commons/math4/stat/inference/BinomialTestTest.java
index 55e1730..4f89f43 100644
--- a/src/test/java/org/apache/commons/math4/stat/inference/BinomialTestTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/inference/BinomialTestTest.java
@@ -18,8 +18,6 @@
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NotPositiveException;
-import org.apache.commons.math4.stat.inference.AlternativeHypothesis;
-import org.apache.commons.math4.stat.inference.BinomialTest;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/inference/ChiSquareTestTest.java b/src/test/java/org/apache/commons/math4/stat/inference/ChiSquareTestTest.java
index 2f0117d..d66d8c0 100644
--- a/src/test/java/org/apache/commons/math4/stat/inference/ChiSquareTestTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/inference/ChiSquareTestTest.java
@@ -21,7 +21,6 @@
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.OutOfRangeException;
 import org.apache.commons.math4.exception.ZeroException;
-import org.apache.commons.math4.stat.inference.ChiSquareTest;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/inference/GTestTest.java b/src/test/java/org/apache/commons/math4/stat/inference/GTestTest.java
index 235224d..5618480 100644
--- a/src/test/java/org/apache/commons/math4/stat/inference/GTestTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/inference/GTestTest.java
@@ -21,7 +21,6 @@
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.OutOfRangeException;
 import org.apache.commons.math4.exception.ZeroException;
-import org.apache.commons.math4.stat.inference.GTest;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/inference/MannWhitneyUTestTest.java b/src/test/java/org/apache/commons/math4/stat/inference/MannWhitneyUTestTest.java
index 0873743..83f6374 100644
--- a/src/test/java/org/apache/commons/math4/stat/inference/MannWhitneyUTestTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/inference/MannWhitneyUTestTest.java
@@ -18,7 +18,6 @@
 
 import org.apache.commons.math4.exception.NoDataException;
 import org.apache.commons.math4.exception.NullArgumentException;
-import org.apache.commons.math4.stat.inference.MannWhitneyUTest;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/inference/OneWayAnovaTest.java b/src/test/java/org/apache/commons/math4/stat/inference/OneWayAnovaTest.java
index cf35f30..4430b2d 100644
--- a/src/test/java/org/apache/commons/math4/stat/inference/OneWayAnovaTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/inference/OneWayAnovaTest.java
@@ -21,7 +21,6 @@
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.stat.descriptive.SummaryStatistics;
-import org.apache.commons.math4.stat.inference.OneWayAnova;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/inference/TTestTest.java b/src/test/java/org/apache/commons/math4/stat/inference/TTestTest.java
index 8f4357d..85bee8f 100644
--- a/src/test/java/org/apache/commons/math4/stat/inference/TTestTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/inference/TTestTest.java
@@ -21,7 +21,6 @@
 import org.apache.commons.math4.exception.NumberIsTooSmallException;
 import org.apache.commons.math4.exception.OutOfRangeException;
 import org.apache.commons.math4.stat.descriptive.SummaryStatistics;
-import org.apache.commons.math4.stat.inference.TTest;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/inference/WilcoxonSignedRankTestTest.java b/src/test/java/org/apache/commons/math4/stat/inference/WilcoxonSignedRankTestTest.java
index 8f39848..e3f21ea 100644
--- a/src/test/java/org/apache/commons/math4/stat/inference/WilcoxonSignedRankTestTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/inference/WilcoxonSignedRankTestTest.java
@@ -20,7 +20,6 @@
 import org.apache.commons.math4.exception.NoDataException;
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
-import org.apache.commons.math4.stat.inference.WilcoxonSignedRankTest;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/interval/AgrestiCoullIntervalTest.java b/src/test/java/org/apache/commons/math4/stat/interval/AgrestiCoullIntervalTest.java
index 77b64d3..2b7739a 100644
--- a/src/test/java/org/apache/commons/math4/stat/interval/AgrestiCoullIntervalTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/interval/AgrestiCoullIntervalTest.java
@@ -16,9 +16,6 @@
  */
 package org.apache.commons.math4.stat.interval;
 
-import org.apache.commons.math4.stat.interval.AgrestiCoullInterval;
-import org.apache.commons.math4.stat.interval.BinomialConfidenceInterval;
-import org.apache.commons.math4.stat.interval.ConfidenceInterval;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/interval/BinomialConfidenceIntervalAbstractTest.java b/src/test/java/org/apache/commons/math4/stat/interval/BinomialConfidenceIntervalAbstractTest.java
index 3909353..50da9a1 100644
--- a/src/test/java/org/apache/commons/math4/stat/interval/BinomialConfidenceIntervalAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/interval/BinomialConfidenceIntervalAbstractTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.stat.interval;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.stat.interval.BinomialConfidenceInterval;
-import org.apache.commons.math4.stat.interval.ConfidenceInterval;
 import org.junit.Before;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/interval/ClopperPearsonIntervalTest.java b/src/test/java/org/apache/commons/math4/stat/interval/ClopperPearsonIntervalTest.java
index 6a06f97..f0611ff 100644
--- a/src/test/java/org/apache/commons/math4/stat/interval/ClopperPearsonIntervalTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/interval/ClopperPearsonIntervalTest.java
@@ -16,9 +16,6 @@
  */
 package org.apache.commons.math4.stat.interval;
 
-import org.apache.commons.math4.stat.interval.BinomialConfidenceInterval;
-import org.apache.commons.math4.stat.interval.ClopperPearsonInterval;
-import org.apache.commons.math4.stat.interval.ConfidenceInterval;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/interval/IntervalUtilsTest.java b/src/test/java/org/apache/commons/math4/stat/interval/IntervalUtilsTest.java
index 2a5bbb8..0b46813 100644
--- a/src/test/java/org/apache/commons/math4/stat/interval/IntervalUtilsTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/interval/IntervalUtilsTest.java
@@ -16,12 +16,6 @@
  */
 package org.apache.commons.math4.stat.interval;
 
-import org.apache.commons.math4.stat.interval.AgrestiCoullInterval;
-import org.apache.commons.math4.stat.interval.ClopperPearsonInterval;
-import org.apache.commons.math4.stat.interval.ConfidenceInterval;
-import org.apache.commons.math4.stat.interval.IntervalUtils;
-import org.apache.commons.math4.stat.interval.NormalApproximationInterval;
-import org.apache.commons.math4.stat.interval.WilsonScoreInterval;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/interval/NormalApproximationIntervalTest.java b/src/test/java/org/apache/commons/math4/stat/interval/NormalApproximationIntervalTest.java
index 25209d3..410c421 100644
--- a/src/test/java/org/apache/commons/math4/stat/interval/NormalApproximationIntervalTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/interval/NormalApproximationIntervalTest.java
@@ -16,9 +16,6 @@
  */
 package org.apache.commons.math4.stat.interval;
 
-import org.apache.commons.math4.stat.interval.BinomialConfidenceInterval;
-import org.apache.commons.math4.stat.interval.ConfidenceInterval;
-import org.apache.commons.math4.stat.interval.NormalApproximationInterval;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/interval/WilsonScoreIntervalTest.java b/src/test/java/org/apache/commons/math4/stat/interval/WilsonScoreIntervalTest.java
index 22eef09..5ec5c0c 100644
--- a/src/test/java/org/apache/commons/math4/stat/interval/WilsonScoreIntervalTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/interval/WilsonScoreIntervalTest.java
@@ -16,9 +16,6 @@
  */
 package org.apache.commons.math4.stat.interval;
 
-import org.apache.commons.math4.stat.interval.BinomialConfidenceInterval;
-import org.apache.commons.math4.stat.interval.ConfidenceInterval;
-import org.apache.commons.math4.stat.interval.WilsonScoreInterval;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/stat/ranking/NaturalRankingTest.java b/src/test/java/org/apache/commons/math4/stat/ranking/NaturalRankingTest.java
index 52184eb..cde1c9b 100644
--- a/src/test/java/org/apache/commons/math4/stat/ranking/NaturalRankingTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/ranking/NaturalRankingTest.java
@@ -19,9 +19,6 @@
 import org.junit.Assert;
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.NotANumberException;
-import org.apache.commons.math4.stat.ranking.NaNStrategy;
-import org.apache.commons.math4.stat.ranking.NaturalRanking;
-import org.apache.commons.math4.stat.ranking.TiesStrategy;
 import org.junit.Test;
 import org.junit.Ignore;
 import org.apache.commons.rng.UniformRandomProvider;
diff --git a/src/test/java/org/apache/commons/math4/stat/regression/GLSMultipleLinearRegressionTest.java b/src/test/java/org/apache/commons/math4/stat/regression/GLSMultipleLinearRegressionTest.java
index bb46c46..9148fa9 100644
--- a/src/test/java/org/apache/commons/math4/stat/regression/GLSMultipleLinearRegressionTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/regression/GLSMultipleLinearRegressionTest.java
@@ -33,8 +33,6 @@
 import org.apache.commons.statistics.distribution.NormalDistribution;
 import org.apache.commons.math4.stat.correlation.Covariance;
 import org.apache.commons.math4.stat.descriptive.DescriptiveStatistics;
-import org.apache.commons.math4.stat.regression.GLSMultipleLinearRegression;
-import org.apache.commons.math4.stat.regression.OLSMultipleLinearRegression;
 
 public class GLSMultipleLinearRegressionTest extends MultipleLinearRegressionAbstractTest {
 
diff --git a/src/test/java/org/apache/commons/math4/stat/regression/MillerUpdatingRegressionTest.java b/src/test/java/org/apache/commons/math4/stat/regression/MillerUpdatingRegressionTest.java
index d7184a7..27a42c9 100644
--- a/src/test/java/org/apache/commons/math4/stat/regression/MillerUpdatingRegressionTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/regression/MillerUpdatingRegressionTest.java
@@ -20,9 +20,6 @@
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.linear.RealMatrix;
 import org.apache.commons.math4.stat.correlation.PearsonsCorrelation;
-import org.apache.commons.math4.stat.regression.MillerUpdatingRegression;
-import org.apache.commons.math4.stat.regression.OLSMultipleLinearRegression;
-import org.apache.commons.math4.stat.regression.RegressionResults;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/regression/MultipleLinearRegressionAbstractTest.java b/src/test/java/org/apache/commons/math4/stat/regression/MultipleLinearRegressionAbstractTest.java
index b7ef50a..7ef6a91 100644
--- a/src/test/java/org/apache/commons/math4/stat/regression/MultipleLinearRegressionAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/regression/MultipleLinearRegressionAbstractTest.java
@@ -20,7 +20,6 @@
 import org.apache.commons.math4.exception.NullArgumentException;
 import org.apache.commons.math4.linear.RealMatrix;
 import org.apache.commons.math4.linear.RealVector;
-import org.apache.commons.math4.stat.regression.AbstractMultipleLinearRegression;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/regression/OLSMultipleLinearRegressionTest.java b/src/test/java/org/apache/commons/math4/stat/regression/OLSMultipleLinearRegressionTest.java
index b253c38..7128c2e 100644
--- a/src/test/java/org/apache/commons/math4/stat/regression/OLSMultipleLinearRegressionTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/regression/OLSMultipleLinearRegressionTest.java
@@ -26,7 +26,6 @@
 import org.apache.commons.math4.linear.RealMatrix;
 import org.apache.commons.math4.linear.RealVector;
 import org.apache.commons.math4.stat.StatUtils;
-import org.apache.commons.math4.stat.regression.OLSMultipleLinearRegression;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/stat/regression/SimpleRegressionTest.java b/src/test/java/org/apache/commons/math4/stat/regression/SimpleRegressionTest.java
index bd793b8..ed8e818 100644
--- a/src/test/java/org/apache/commons/math4/stat/regression/SimpleRegressionTest.java
+++ b/src/test/java/org/apache/commons/math4/stat/regression/SimpleRegressionTest.java
@@ -22,10 +22,6 @@
 import org.apache.commons.math4.exception.OutOfRangeException;
 import org.apache.commons.rng.UniformRandomProvider;
 import org.apache.commons.rng.simple.RandomSource;
-import org.apache.commons.math4.stat.regression.ModelSpecificationException;
-import org.apache.commons.math4.stat.regression.RegressionResults;
-import org.apache.commons.math4.stat.regression.SimpleRegression;
-import org.apache.commons.math4.stat.regression.UpdatingMultipleLinearRegression;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/transform/FastCosineTransformerTest.java b/src/test/java/org/apache/commons/math4/transform/FastCosineTransformerTest.java
index 0769706..26958ed 100644
--- a/src/test/java/org/apache/commons/math4/transform/FastCosineTransformerTest.java
+++ b/src/test/java/org/apache/commons/math4/transform/FastCosineTransformerTest.java
@@ -24,11 +24,6 @@
 import org.apache.commons.math4.analysis.function.Sinc;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.MathIllegalStateException;
-import org.apache.commons.math4.transform.DctNormalization;
-import org.apache.commons.math4.transform.FastCosineTransformer;
-import org.apache.commons.math4.transform.RealTransformer;
-import org.apache.commons.math4.transform.TransformType;
-import org.apache.commons.math4.transform.TransformUtils;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/transform/FastFourierTransformerTest.java b/src/test/java/org/apache/commons/math4/transform/FastFourierTransformerTest.java
index b49d964..e1cfe8a 100644
--- a/src/test/java/org/apache/commons/math4/transform/FastFourierTransformerTest.java
+++ b/src/test/java/org/apache/commons/math4/transform/FastFourierTransformerTest.java
@@ -25,10 +25,6 @@
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
-import org.apache.commons.math4.transform.DftNormalization;
-import org.apache.commons.math4.transform.FastFourierTransformer;
-import org.apache.commons.math4.transform.TransformType;
-import org.apache.commons.math4.transform.TransformUtils;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/transform/FastHadamardTransformerTest.java b/src/test/java/org/apache/commons/math4/transform/FastHadamardTransformerTest.java
index 4513732..8368ef9 100644
--- a/src/test/java/org/apache/commons/math4/transform/FastHadamardTransformerTest.java
+++ b/src/test/java/org/apache/commons/math4/transform/FastHadamardTransformerTest.java
@@ -17,8 +17,6 @@
 package org.apache.commons.math4.transform;
 
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
-import org.apache.commons.math4.transform.FastHadamardTransformer;
-import org.apache.commons.math4.transform.TransformType;
 import org.apache.commons.numbers.core.Precision;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/transform/FastSineTransformerTest.java b/src/test/java/org/apache/commons/math4/transform/FastSineTransformerTest.java
index 9a1dfcd..ddd25fe 100644
--- a/src/test/java/org/apache/commons/math4/transform/FastSineTransformerTest.java
+++ b/src/test/java/org/apache/commons/math4/transform/FastSineTransformerTest.java
@@ -24,11 +24,6 @@
 import org.apache.commons.math4.analysis.function.Sinc;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.MathIllegalStateException;
-import org.apache.commons.math4.transform.DstNormalization;
-import org.apache.commons.math4.transform.FastSineTransformer;
-import org.apache.commons.math4.transform.RealTransformer;
-import org.apache.commons.math4.transform.TransformType;
-import org.apache.commons.math4.transform.TransformUtils;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/transform/RealTransformerAbstractTest.java b/src/test/java/org/apache/commons/math4/transform/RealTransformerAbstractTest.java
index 1e3bf8c..bc4e453 100644
--- a/src/test/java/org/apache/commons/math4/transform/RealTransformerAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/transform/RealTransformerAbstractTest.java
@@ -22,8 +22,6 @@
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
-import org.apache.commons.math4.transform.RealTransformer;
-import org.apache.commons.math4.transform.TransformType;
 import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/util/BigRealFieldTest.java b/src/test/java/org/apache/commons/math4/util/BigRealFieldTest.java
index 01000e4..10133cc 100644
--- a/src/test/java/org/apache/commons/math4/util/BigRealFieldTest.java
+++ b/src/test/java/org/apache/commons/math4/util/BigRealFieldTest.java
@@ -18,8 +18,6 @@
 
 
 import org.apache.commons.math4.TestUtils;
-import org.apache.commons.math4.util.BigReal;
-import org.apache.commons.math4.util.BigRealField;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/util/BigRealTest.java b/src/test/java/org/apache/commons/math4/util/BigRealTest.java
index b0ac794..2acbe53 100644
--- a/src/test/java/org/apache/commons/math4/util/BigRealTest.java
+++ b/src/test/java/org/apache/commons/math4/util/BigRealTest.java
@@ -22,8 +22,6 @@
 
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.MathArithmeticException;
-import org.apache.commons.math4.util.BigReal;
-import org.apache.commons.math4.util.FastMath;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/util/CombinatoricsUtilsTest.java b/src/test/java/org/apache/commons/math4/util/CombinatoricsUtilsTest.java
index 4d89e45..0a8f407 100644
--- a/src/test/java/org/apache/commons/math4/util/CombinatoricsUtilsTest.java
+++ b/src/test/java/org/apache/commons/math4/util/CombinatoricsUtilsTest.java
@@ -24,7 +24,6 @@
 import org.apache.commons.math4.exception.NotPositiveException;
 import org.apache.commons.math4.exception.NumberIsTooLargeException;
 import org.apache.commons.numbers.combinatorics.BinomialCoefficient;
-import org.apache.commons.math4.util.CombinatoricsUtils;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/util/Decimal64Test.java b/src/test/java/org/apache/commons/math4/util/Decimal64Test.java
index 45d5fae..bc2165c 100644
--- a/src/test/java/org/apache/commons/math4/util/Decimal64Test.java
+++ b/src/test/java/org/apache/commons/math4/util/Decimal64Test.java
@@ -17,7 +17,6 @@
 package org.apache.commons.math4.util;
 
 import org.apache.commons.math4.ExtendedFieldElementAbstractTest;
-import org.apache.commons.math4.util.Decimal64;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/util/DefaultTransformerTest.java b/src/test/java/org/apache/commons/math4/util/DefaultTransformerTest.java
index 826e976..9822086 100644
--- a/src/test/java/org/apache/commons/math4/util/DefaultTransformerTest.java
+++ b/src/test/java/org/apache/commons/math4/util/DefaultTransformerTest.java
@@ -22,7 +22,6 @@
 import org.apache.commons.math4.TestUtils;
 import org.apache.commons.math4.exception.MathIllegalArgumentException;
 import org.apache.commons.math4.exception.NullArgumentException;
-import org.apache.commons.math4.util.DefaultTransformer;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/util/DoubleArrayAbstractTest.java b/src/test/java/org/apache/commons/math4/util/DoubleArrayAbstractTest.java
index f3c27e0..832deaf 100644
--- a/src/test/java/org/apache/commons/math4/util/DoubleArrayAbstractTest.java
+++ b/src/test/java/org/apache/commons/math4/util/DoubleArrayAbstractTest.java
@@ -17,7 +17,6 @@
 package org.apache.commons.math4.util;
 
 import org.apache.commons.math4.stat.StatUtils;
-import org.apache.commons.math4.util.DoubleArray;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/util/FastMathStrictComparisonTest.java b/src/test/java/org/apache/commons/math4/util/FastMathStrictComparisonTest.java
index 4488c42..ef5c825 100644
--- a/src/test/java/org/apache/commons/math4/util/FastMathStrictComparisonTest.java
+++ b/src/test/java/org/apache/commons/math4/util/FastMathStrictComparisonTest.java
@@ -25,7 +25,6 @@
 import java.util.List;
 
 import org.apache.commons.math4.exception.MathArithmeticException;
-import org.apache.commons.math4.util.FastMath;
 import org.apache.commons.numbers.core.Precision;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/util/MathArraysTest.java b/src/test/java/org/apache/commons/math4/util/MathArraysTest.java
index 3d53a72..882cbd4 100644
--- a/src/test/java/org/apache/commons/math4/util/MathArraysTest.java
+++ b/src/test/java/org/apache/commons/math4/util/MathArraysTest.java
@@ -25,8 +25,6 @@
 import org.apache.commons.math4.exception.NotPositiveException;
 import org.apache.commons.math4.exception.NotStrictlyPositiveException;
 import org.apache.commons.math4.exception.NullArgumentException;
-import org.apache.commons.math4.util.FastMath;
-import org.apache.commons.math4.util.MathArrays;
 import org.apache.commons.numbers.core.Precision;
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/util/OpenIntToDoubleHashMapTest.java b/src/test/java/org/apache/commons/math4/util/OpenIntToDoubleHashMapTest.java
index 4223f1d..a38328b 100644
--- a/src/test/java/org/apache/commons/math4/util/OpenIntToDoubleHashMapTest.java
+++ b/src/test/java/org/apache/commons/math4/util/OpenIntToDoubleHashMapTest.java
@@ -24,7 +24,6 @@
 import java.util.Random;
 import java.util.Set;
 
-import org.apache.commons.math4.util.OpenIntToDoubleHashMap;
 import org.apache.commons.numbers.core.Precision;
 import org.junit.Assert;
 import org.junit.Before;
diff --git a/src/test/java/org/apache/commons/math4/util/OpenIntToFieldTest.java b/src/test/java/org/apache/commons/math4/util/OpenIntToFieldTest.java
index 229425d..00ba45d 100644
--- a/src/test/java/org/apache/commons/math4/util/OpenIntToFieldTest.java
+++ b/src/test/java/org/apache/commons/math4/util/OpenIntToFieldTest.java
@@ -29,7 +29,6 @@
 import org.apache.commons.math4.dfp.Dfp;
 import org.apache.commons.math4.dfp.DfpField;
 import org.apache.commons.math4.linear.Dfp25;
-import org.apache.commons.math4.util.OpenIntToFieldHashMap;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/src/test/java/org/apache/commons/math4/util/PairTest.java b/src/test/java/org/apache/commons/math4/util/PairTest.java
index ba6798e..c114a8d 100644
--- a/src/test/java/org/apache/commons/math4/util/PairTest.java
+++ b/src/test/java/org/apache/commons/math4/util/PairTest.java
@@ -13,7 +13,6 @@
  */
 package org.apache.commons.math4.util;
 
-import org.apache.commons.math4.util.Pair;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/src/test/java/org/apache/commons/math4/util/TransformerMapTest.java b/src/test/java/org/apache/commons/math4/util/TransformerMapTest.java
index 796ec69..98051c7 100644
--- a/src/test/java/org/apache/commons/math4/util/TransformerMapTest.java
+++ b/src/test/java/org/apache/commons/math4/util/TransformerMapTest.java
@@ -18,9 +18,6 @@
 package org.apache.commons.math4.util;
 
 import org.apache.commons.math4.TestUtils;
-import org.apache.commons.math4.util.DefaultTransformer;
-import org.apache.commons.math4.util.NumberTransformer;
-import org.apache.commons.math4.util.TransformerMap;
 import org.junit.Assert;
 import org.junit.Test;