Index: src/main/java/org/apache/maven/plugin/surefire/SurefirePlugin.java
===================================================================
--- src/main/java/org/apache/maven/plugin/surefire/SurefirePlugin.java	(Revision 431038)
+++ src/main/java/org/apache/maven/plugin/surefire/SurefirePlugin.java	(Arbeitskopie)
@@ -559,8 +559,19 @@
             }
             else if ( junitArtifact != null )
             {
-                surefireBooter.addTestSuite( "org.apache.maven.surefire.junit.JUnitDirectoryTestSuite",
-                                             new Object[]{testClassesDirectory, includes, excludes} );
+                String junitDirectoryTestSuite;
+
+                if ( junitArtifact.getBaseVersion().startsWith( "4" ) )
+                {
+                    junitDirectoryTestSuite = "org.apache.maven.surefire.junit.JUnit4DirectoryTestSuite";
+                }
+                else
+                {
+                    junitDirectoryTestSuite = "org.apache.maven.surefire.junit.JUnitDirectoryTestSuite";
+                }
+
+                surefireBooter.addTestSuite( junitDirectoryTestSuite, new Object[] { testClassesDirectory, includes,
+                    excludes } );
             }
             else
             {