Fix test suite

Author: codingjoe

tests/contrib/auth/test_models.py

@@ -20,7 +20,7 @@ def test_get_session_auth_hash__value_error(self, db):
         with pytest.raises(ValueError) as e:
             user.get_session_auth_hash()
 
-        assert "'session_salt' must be set" in str(e)
+        assert "'session_salt' must be set" in str(e.value)
 
     def test_get_session_auth_hash__unique(self, db):
         spiderman = EmailUser(email='spiderman@avengers.com')