Patch by Christian Heimes to change self.assert_(x == y) into
self.assertEqual(x, y).  (Christian used self.failUnlessEqual(),
but the double negative makes it hard to grok, so I changed it.)
diff --git a/Lib/test/test_unittest.py b/Lib/test/test_unittest.py
index 98066e4..944ab22 100644
--- a/Lib/test/test_unittest.py
+++ b/Lib/test/test_unittest.py
@@ -1113,7 +1113,7 @@
     # "The default value is 'test'"
     def test_testMethodPrefix__default_value(self):
         loader = unittest.TestLoader()
-        self.failUnless(loader.testMethodPrefix == 'test')
+        self.assertEqual(loader.testMethodPrefix, 'test')
 
     ################################################################
     ### /Tests for TestLoader.testMethodPrefix