diff --git a/backend/test/integration/test_schedule.py b/backend/test/integration/test_schedule.py
index 469107eee..2e750d267 100644
--- a/backend/test/integration/test_schedule.py
+++ b/backend/test/integration/test_schedule.py
@@ -462,7 +462,8 @@ def bust_cached_events(self, all_calendars = False):
             ),
             attendee=schemas.AttendeeBase(
                 email='hello@example.org',
-                name='Greg'
+                name='Greg',
+                timezone='Europe/Berlin'
             )
         ).model_dump(mode='json')