Clear event caches when we purge history (#15609)

This should help a little with #13476

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Co-authored-by: Patrick Cloke <patrickc@matrix.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/handlers/test_sync.py b/tests/handlers/test_sync.py

index 0d9a3de92a..9f035a02dc 100644
--- a/tests/handlers/test_sync.py
+++ b/tests/handlers/test_sync.py
@@ -163,7 +163,7 @@ 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_rooms_for_user.invalidate_all()
-        self.get_success(self.store._get_event_cache.clear())
+        self.store._get_event_cache.clear()
         self.store._event_ref.clear()
 
         # The rooms should be excluded from the sync response.