Fix a NameError in test_enumerate.

Lib/test/test_enumerate.py

@@ -245,7 +245,7 @@ def test_main(verbose=None):
     if verbose and hasattr(sys, "gettotalrefcount"):
         counts = [None] * 5
         for i in xrange(len(counts)):
-            test_support.run_unittest(*testclasses)
+            test_support.run_unittest(__name__)
             counts[i] = sys.gettotalrefcount()
         print counts