diff --git a/gnuviechadmin/osusers/tests/test_admin.py b/gnuviechadmin/osusers/tests/test_admin.py
index 12091ba..cf75a5a 100644
--- a/gnuviechadmin/osusers/tests/test_admin.py
+++ b/gnuviechadmin/osusers/tests/test_admin.py
@@ -70,6 +70,10 @@ class UserCreationFormTest(TestCase):
         self.assertIsNotNone(user)
         self.assertEqual(User.objects.get(pk=user.uid), user)
 
+    def test_save_m2m_returns_none(self):
+        form = UserCreationForm()
+        self.assertIsNone(form.save_m2m())
+
 
 class UserAdminTest(TestCase):
     def setUp(self):