Ticket #12590: 12590.diff

tests/modeltests/validators/tests.py

@@ -119 +119 @@
 )
 
 def create_simple_test_method(validator, expected, value, num):
-    if isinstance(expected, type) and issubclass(expected, Exception):
+    if expected is not None and issubclass(expected, Exception):
         test_mask = 'test_%s_raises_error_%d'
         def test_func(self):
             self.assertRaises(expected, validator, value)