diff --git a/gnuviechadmin/osusers/tests/test_admin.py b/gnuviechadmin/osusers/tests/test_admin.py
index ac8f10d..87d0c10 100644
--- a/gnuviechadmin/osusers/tests/test_admin.py
+++ b/gnuviechadmin/osusers/tests/test_admin.py
@@ -107,3 +107,5 @@ class UserAdminTest(TestCase):
         inlines = self.uadmin.get_inline_instances(
             Mock(name='request'), user)
         self.assertEqual(len(inlines), len(UserAdmin.inlines))
+        for index in range(len(inlines)):
+            self.assertIsInstance(inlines[index], UserAdmin.inlines[index])