diff -r 478b4e9551fa Lib/test/test_defaultdict.py --- a/Lib/test/test_defaultdict.py Sun Dec 04 23:56:30 2011 +0100 +++ b/Lib/test/test_defaultdict.py Mon Dec 05 23:28:17 2011 +1000 @@ -171,6 +171,8 @@ finally: os.remove(tfn) + def test_callable_arg(self): + self.assertRaises(TypeError, defaultdict, {}) def test_main(): test_support.run_unittest(TestDefaultDict)