Added test scope dependency on commons-numbers-core.
diff --git a/commons-numbers-complex-streams/pom.xml b/commons-numbers-complex-streams/pom.xml
index 4cbd235..624e118 100644
--- a/commons-numbers-complex-streams/pom.xml
+++ b/commons-numbers-complex-streams/pom.xml
@@ -50,6 +50,12 @@
 
     <dependency>
       <groupId>org.apache.commons</groupId>
+      <artifactId>commons-numbers-core</artifactId>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.apache.commons</groupId>
       <artifactId>commons-math3</artifactId>
       <scope>test</scope>
     </dependency>