diff --git a/tests/rest/client/test_third_party_rules.py b/tests/rest/client/test_third_party_rules.py
index 355024ff81a0..753ecc8d161a 100644
--- a/tests/rest/client/test_third_party_rules.py
+++ b/tests/rest/client/test_third_party_rules.py
@@ -1011,7 +1011,7 @@ def test_on_remove_user_third_party_identifier_is_called_on_deactivate(
         )
         third_party_rules = self.hs.get_third_party_event_rules()
         third_party_rules.register_third_party_rules_callbacks(
-            on_threepid_bind=on_remove_user_third_party_identifier_callback_mock,
+            on_remove_user_third_party_identifier=on_remove_user_third_party_identifier_callback_mock,
         )
 
         # Register an admin user.