1 files changed, 1 insertions, 0 deletions
diff --git a/tests/handlers/test_sync.py b/tests/handlers/test_sync.py
index 865b8b7e47..db3302a4c7 100644
--- a/tests/handlers/test_sync.py
+++ b/tests/handlers/test_sync.py
@@ -160,6 +160,7 @@ class SyncTestCase(tests.unittest.HomeserverTestCase):
         # Blow away caches (supported room versions can only change due to a restart).
         self.store.get_rooms_for_user_with_stream_ordering.invalidate_all()
         self.store._get_event_cache.clear()
+        self.store._event_ref.clear()
 
         # The rooms should be excluded from the sync response.
         # Get a new request key.