diff --git a/Lib/test/test_traceback.py b/Lib/test/test_traceback.py
index 51fb9e6..1b9e2f8 100644
--- a/Lib/test/test_traceback.py
+++ b/Lib/test/test_traceback.py
@@ -118,7 +118,11 @@
         err = traceback.format_exception_only(X, X())
         self.assertEqual(len(err), 1)
         str_value = '<unprintable %s object>' % X.__name__
-        self.assertEqual(err[0], "%s: %s\n" % ( X.__name__, str_value))
+        if X.__module__ in ('__main__', '__builtin__'):
+            str_name = X.__name__
+        else:
+            str_name = '.'.join([X.__module__, X.__name__])
+        self.assertEqual(err[0], "%s: %s\n" % (str_name, str_value))
 
     def test_without_exception(self):
         err = traceback.format_exception_only(None, None)