diff --git a/tests/replication/tcp/streams/test_federation.py b/tests/replication/tcp/streams/test_federation.py

index bcb82c9c80..cdbdfaf057 100644
--- a/tests/replication/tcp/streams/test_federation.py
+++ b/tests/replication/tcp/streams/test_federation.py
@@ -26,7 +26,7 @@ class FederationStreamTestCase(BaseStreamTestCase):
         config["federation_sender_instances"] = ["federation_sender1"]
         return config
 
-    def test_catchup(self):
+    def test_catchup(self) -> None:
         """Basic test of catchup on reconnect
 
         Makes sure that updates sent while we are offline are received later.