diff --git a/allauth_ens/tests.py b/allauth_ens/tests.py
index f8bf5c0..002a8f3 100644
--- a/allauth_ens/tests.py
+++ b/allauth_ens/tests.py
@@ -375,4 +375,4 @@ class LongTermClipperTests(CASTestCase):
         for uid in uids:
             with self.assertRaises(ValueError) as cm:
                 get_ldap_infos(uid)
-            self.assertIn(uid, cm.exception.message)
+            self.assertIn(uid, str(cm.exception))