diff --git a/src/main/java/org/apache/maven/shared/dependency/analyzer/asm/ConstantPoolParser.java b/src/main/java/org/apache/maven/shared/dependency/analyzer/asm/ConstantPoolParser.java
index 81494ed..8ff1ccd 100644
--- a/src/main/java/org/apache/maven/shared/dependency/analyzer/asm/ConstantPoolParser.java
+++ b/src/main/java/org/apache/maven/shared/dependency/analyzer/asm/ConstantPoolParser.java
@@ -170,7 +170,13 @@
         Set<String> result = new HashSet<>();
         for ( Integer aClass : classes )
         {
-            result.add( stringConstants.get( aClass ) );
+            String className = stringConstants.get( aClass );
+
+            // filter out things from unnamed package, probably a false-positive
+            if ( isImportableClass( className ) )
+            {
+                result.add( className );
+            }
         }
         return result;
     }
@@ -207,4 +213,10 @@
         ( (Buffer) buf ).limit( oldLimit );
         return sb.toString();
     }
+
+    private static boolean isImportableClass( String className )
+    {
+        // without a slash, class must be in unnamed package, which can't be imported
+        return className.indexOf( '/' ) != -1;
+    }
 }
diff --git a/src/test/java/org/apache/maven/shared/dependency/analyzer/DefaultProjectDependencyAnalyzerTest.java b/src/test/java/org/apache/maven/shared/dependency/analyzer/DefaultProjectDependencyAnalyzerTest.java
index cefd20e..aa2d52a 100644
--- a/src/test/java/org/apache/maven/shared/dependency/analyzer/DefaultProjectDependencyAnalyzerTest.java
+++ b/src/test/java/org/apache/maven/shared/dependency/analyzer/DefaultProjectDependencyAnalyzerTest.java
@@ -19,6 +19,7 @@
  */
 
 import org.apache.commons.lang3.JavaVersion;
+import org.apache.commons.lang3.SystemUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.DefaultArtifact;
 import org.apache.maven.artifact.handler.ArtifactHandler;
@@ -32,6 +33,10 @@
 import org.apache.maven.shared.test.plugin.RepositoryTool;
 import org.apache.maven.shared.test.plugin.TestToolsException;
 import org.codehaus.plexus.PlexusTestCase;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
 
 import java.io.File;
 import java.util.Arrays;
@@ -42,6 +47,7 @@
 import java.util.Set;
 
 import static org.apache.commons.lang3.SystemUtils.isJavaVersionAtLeast;
+import static org.junit.Assume.assumeTrue;
 
 /**
  * Tests <code>DefaultProjectDependencyAnalyzer</code>.
@@ -49,6 +55,7 @@
  * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>
  * @see DefaultProjectDependencyAnalyzer
  */
+@RunWith( JUnit4.class )
 public class DefaultProjectDependencyAnalyzerTest
     extends PlexusTestCase
 {
@@ -63,7 +70,8 @@
     /*
      * @see org.codehaus.plexus.PlexusTestCase#setUp()
      */
-    protected void setUp()
+    @Before
+    public void setUp()
         throws Exception
     {
         super.setUp();
@@ -82,8 +90,7 @@
         analyzer = (ProjectDependencyAnalyzer) lookup( ProjectDependencyAnalyzer.ROLE );
     }
 
-    // tests ------------------------------------------------------------------
-
+    @Test
     public void testPom()
         throws TestToolsException, ProjectDependencyAnalyzerException
     {
@@ -98,6 +105,7 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testJarWithNoDependencies()
         throws TestToolsException, ProjectDependencyAnalyzerException
     {
@@ -112,13 +120,11 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testJava8methodRefs()
         throws TestToolsException, ProjectDependencyAnalyzerException
     {
-        if ( !isJavaVersionAtLeast( JavaVersion.JAVA_1_8 ) )
-        {
-            return;
-        }
+        assumeTrue( SystemUtils.isJavaVersionAtLeast( JavaVersion.JAVA_1_8 ) );
 
         // Only visible through constant pool analysis (supported for JDK8+)
         compileProject( "java8methodRefs/pom.xml" );
@@ -138,13 +144,11 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testInlinedStaticReference()
         throws TestToolsException, ProjectDependencyAnalyzerException
     {
-        if ( !isJavaVersionAtLeast( JavaVersion.JAVA_1_8 ) )
-        {
-            return;
-        }
+        assumeTrue( SystemUtils.isJavaVersionAtLeast( JavaVersion.JAVA_1_8 ) );
 
         // Only visible through constant pool analysis (supported for JDK8+)
         compileProject( "inlinedStaticReference/pom.xml" );
@@ -163,6 +167,7 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testJarWithCompileDependency()
         throws TestToolsException, ProjectDependencyAnalyzerException
     {
@@ -188,6 +193,7 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testForceDeclaredDependenciesUsage()
         throws TestToolsException, ProjectDependencyAnalyzerException
     {
@@ -222,6 +228,7 @@
         }
     }
 
+    @Test
     public void testJarWithTestDependency()
         throws TestToolsException, ProjectDependencyAnalyzerException
     {
@@ -253,6 +260,7 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testJarWithXmlTransitiveDependency()
         throws TestToolsException, ProjectDependencyAnalyzerException
     {
@@ -272,6 +280,7 @@
         // assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testJarWithCompileScopedTestDependency()
             throws TestToolsException, ProjectDependencyAnalyzerException
     {
@@ -305,6 +314,7 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testJarWithRuntimeScopedTestDependency() throws TestToolsException, ProjectDependencyAnalyzerException
     {
         // We can't effectively analyze runtime dependencies at this time
@@ -337,6 +347,7 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testMultimoduleProject()
         throws TestToolsException, ProjectDependencyAnalyzerException
     {
@@ -367,14 +378,12 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testTypeUseAnnotationDependency()
             throws TestToolsException, ProjectDependencyAnalyzerException
     {
         // java.lang.annotation.ElementType.TYPE_USE introduced with Java 1.8
-        if ( !isJavaVersionAtLeast( JavaVersion.JAVA_1_8 ) )
-        {
-            return;
-        }
+        assumeTrue( SystemUtils.isJavaVersionAtLeast( JavaVersion.JAVA_1_8 ) );
 
         Properties properties = new Properties();
         properties.put( "maven.compiler.source", "1.8" );
@@ -394,14 +403,12 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
     public void testTypeUseAnnotationDependencyOnLocalVariable()
             throws TestToolsException, ProjectDependencyAnalyzerException
     {
         // java.lang.annotation.ElementType.TYPE_USE introduced with Java 1.8
-        if ( !isJavaVersionAtLeast( JavaVersion.JAVA_1_8 ) )
-        {
-            return;
-        }
+        assumeTrue( SystemUtils.isJavaVersionAtLeast( JavaVersion.JAVA_1_8 ) );
 
         Properties properties = new Properties();
         properties.put( "maven.compiler.source", "1.8" );
@@ -421,6 +428,30 @@
         assertEquals( expectedAnalysis, actualAnalysis );
     }
 
+    @Test
+    public void testUnnamedPackageClassReference()
+        throws TestToolsException, ProjectDependencyAnalyzerException
+    {
+        assumeTrue( SystemUtils.isJavaVersionAtLeast( JavaVersion.JAVA_1_8 ) );
+
+        // Only visible through constant pool analysis (supported for JDK8+)
+        compileProject( "unnamedPackageClassReference/pom.xml" );
+
+        MavenProject project = getProject( "unnamedPackageClassReference/pom.xml" );
+
+        ProjectDependencyAnalysis actualAnalysis = analyzer.analyze( project );
+
+        Artifact dnsjava = createArtifact( "dnsjava", "dnsjava", "jar", "2.1.8", "compile" );
+        // we don't use any dnsjava classes so this should show up as an unused dep
+        Set<Artifact> unusedDeclaredArtifacts = Collections.singleton( dnsjava );
+
+        ProjectDependencyAnalysis expectedAnalysis =
+            new ProjectDependencyAnalysis( new HashSet<Artifact>(), new HashSet<Artifact>(), unusedDeclaredArtifacts,
+                new HashSet<Artifact>() );
+
+        assertEquals( expectedAnalysis, actualAnalysis );
+    }
+
     // private methods --------------------------------------------------------
 
     private void compileProject( String pomPath )
diff --git a/src/test/resources/unnamedPackageClassReference/pom.xml b/src/test/resources/unnamedPackageClassReference/pom.xml
new file mode 100644
index 0000000..bd79056
--- /dev/null
+++ b/src/test/resources/unnamedPackageClassReference/pom.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements.  See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership.  The ASF licenses this file
+  ~ to you under the Apache License, Version 2.0 (the
+  ~ "License"); you may not use this file except in compliance
+  ~ with the License.  You may obtain a copy of the License at
+  ~
+  ~   http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing,
+  ~ software distributed under the License is distributed on an
+  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  ~ KIND, either express or implied.  See the License for the
+  ~ specific language governing permissions and limitations
+  ~ under the License.
+  -->
+
+<project
+    xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+>
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.shared.dependency-analyzer.tests</groupId>
+  <artifactId>unnamedPackageClassReference</artifactId>
+  <version>1.0</version>
+  <packaging>jar</packaging>
+
+  <dependencies>
+    <dependency>
+      <groupId>dnsjava</groupId>
+      <artifactId>dnsjava</artifactId>
+      <version>2.1.8</version>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/src/test/resources/unnamedPackageClassReference/src/main/java/unnamedPackageClassReference/Project.java b/src/test/resources/unnamedPackageClassReference/src/main/java/unnamedPackageClassReference/Project.java
new file mode 100644
index 0000000..ff6c63a
--- /dev/null
+++ b/src/test/resources/unnamedPackageClassReference/src/main/java/unnamedPackageClassReference/Project.java
@@ -0,0 +1,31 @@
+package unnamedPackageClassReference;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+public class Project
+{
+    // dnsjava 2.1.8 includes a class called "update"
+    public static final String UPDATE = "update";
+
+    public Project()
+    {
+        // no op
+    }
+}