1 files changed, 3 insertions, 0 deletions
diff --git a/tests/replication/slave/storage/_base.py b/tests/replication/slave/storage/_base.py
index 4f924ce451..e7472e3a93 100644
--- a/tests/replication/slave/storage/_base.py
+++ b/tests/replication/slave/storage/_base.py
@@ -48,7 +48,10 @@ class BaseSlavedStoreTestCase(unittest.HomeserverTestCase):
         server_factory = ReplicationStreamProtocolFactory(self.hs)
         self.streamer = server_factory.streamer
 
+        handler_factory = Mock()
         self.replication_handler = ReplicationClientHandler(self.slaved_store)
+        self.replication_handler.factory = handler_factory
+
         client_factory = ReplicationClientFactory(
             self.hs, "client_name", self.replication_handler
         )