Changed test assertion strategy used in 04d9730b.

tests/regressiontests/generic_relations_regress/tests.py

@@ -106,9 +106,7 @@ class GenericRelationTests(TestCase):
         # Fails with another, ORM-level error
         dev1 = Developer(name='Joe')
         note = Note(note='Deserves promotion', content_object=dev1)
-        self.assertRaisesMessage(IntegrityError,
-                "generic_relations_regress_note.object_id may not be NULL",
-                note.save)
+        self.assertRaises(IntegrityError, note.save)
 
     def test_target_model_len_zero(self):
         """Test for #13085 -- __len__() returns 0"""