Use better JUnit API
diff --git a/auxiliary-builds/javagroups/src/test/org/apache/commons/jcs/auxiliary/javagroups/JavaGroupsCacheTest.java b/auxiliary-builds/javagroups/src/test/org/apache/commons/jcs/auxiliary/javagroups/JavaGroupsCacheTest.java
index 12c1ab0..c9e6eb3 100644
--- a/auxiliary-builds/javagroups/src/test/org/apache/commons/jcs/auxiliary/javagroups/JavaGroupsCacheTest.java
+++ b/auxiliary-builds/javagroups/src/test/org/apache/commons/jcs/auxiliary/javagroups/JavaGroupsCacheTest.java
@@ -77,7 +77,7 @@
 
         Thread.sleep( 500 );
 
-        assertEquals( null, two.get( "2") );
+        assertNull( two.get( "2") );
 
         // Remove all values
 
@@ -85,11 +85,11 @@
 
         Thread.sleep( 500 );
 
-        assertEquals( null, two.get( "1" ) );
-        assertEquals( null, two.get( "2" ) );
-        assertEquals( null, two.get( "3" ) );
-        assertEquals( null, two.get( "4" ) );
-        assertEquals( null, two.get( "5" ) );
+        assertNull( two.get( "1" ) );
+        assertNull( two.get( "2" ) );
+        assertNull( two.get( "3" ) );
+        assertNull( two.get( "4" ) );
+        assertNull( two.get( "5" ) );
 
         // Free caches