diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index 1932fa82a4..e2ff9aaedf 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -1345,6 +1345,7 @@ class FederationServer(FederationBase):
         Raises:
             AuthError if the server does not match the ACL
         """
+        # Test.
         server_acl_evaluator = (
             await self._storage_controllers.state.get_server_acl_for_room(room_id)
         )