foo.diff

diff --git a/tests/forms_tests/tests/test_forms.py b/tests/forms_tests/tests/test_forms.py
index 7f30b0e..faccda1 100644
--- a/tests/forms_tests/tests/test_forms.py
+++ b/tests/forms_tests/tests/test_forms.py
@@ -693,6 +693,7 @@ class FormsTestCase(TestCase):
                     self.add_error('password1', 'Forbidden value 2.')
                 if self.cleaned_data.get('password2') == 'FORBIDDEN_VALUE2':
                     self.add_error('password2', 'Forbidden value 2.')
+                    raise ValidationError("I'm a non field error.")
 
                 return self.cleaned_data
 
@@ -729,7 +730,7 @@ class FormsTestCase(TestCase):
         self.assertEqual(f.errors['password2'], ['Forbidden value.'])
 
         f = UserRegistration({'username': 'adrian', 'password1': 'FORBIDDEN_VALUE2', 'password2': 'FORBIDDEN_VALUE2'}, auto_id=False)
-        self.assertEqual(f.errors['__all__'], ['Forbidden value 2.'])
+        self.assertEqual(f.errors['__all__'], ['Forbidden value 2.', "I'm a non field error."])
         self.assertEqual(f.errors['password1'], ['Forbidden value 2.'])
         self.assertEqual(f.errors['password2'], ['Forbidden value 2.'])