diff --git a/tests/federation/test_federation_catch_up.py b/tests/federation/test_federation_catch_up.py
index 573ca9974f..11eb565b3b 100644
--- a/tests/federation/test_federation_catch_up.py
+++ b/tests/federation/test_federation_catch_up.py
@@ -213,7 +213,9 @@ class FederationCatchUpTestCases(FederatingHomeserverTestCase):
         self.pump()
 
         lsso_1 = self.get_success(
-            self.hs.get_datastore().get_destination_last_successful_stream_ordering("host2")
+            self.hs.get_datastore().get_destination_last_successful_stream_ordering(
+                "host2"
+            )
         )
 
         self.assertIsNone(
@@ -227,7 +229,9 @@ class FederationCatchUpTestCases(FederatingHomeserverTestCase):
         event_id_2 = self.helper.send(room, "rabbits!", tok=u1_token)["event_id"]
 
         lsso_2 = self.get_success(
-            self.hs.get_datastore().get_destination_last_successful_stream_ordering("host2")
+            self.hs.get_datastore().get_destination_last_successful_stream_ordering(
+                "host2"
+            )
         )
         row_2 = self.get_destination_room(room)