Simplify the way the `HomeServer` object caches its internal attributes. (#8565)

Changes `@cache_in_self` to use underscore-prefixed attributes.

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/replication/_base.py b/tests/replication/_base.py

index 516db4c30a..295c5d58a6 100644
--- a/tests/replication/_base.py
+++ b/tests/replication/_base.py
@@ -78,7 +78,7 @@ class BaseStreamTestCase(unittest.HomeserverTestCase):
         self.worker_hs.get_datastore().db_pool = hs.get_datastore().db_pool
 
         self.test_handler = self._build_replication_data_handler()
-        self.worker_hs.replication_data_handler = self.test_handler
+        self.worker_hs._replication_data_handler = self.test_handler
 
         repl_handler = ReplicationCommandHandler(self.worker_hs)
         self.client = ClientReplicationStreamProtocol(