diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py
index a9faa3127091..105e68353fc9 100644
--- a/synapse/rest/client/v1/room.py
+++ b/synapse/rest/client/v1/room.py
@@ -743,9 +743,7 @@ def on_POST(self, request, room_id, event_id, txn_id=None):
 
         # Redact any m.replace relations of this event
         relation_chunk = yield self.store.get_relations_for_event(
-            event_id,
-            relation_type="m.replace",
-            event_type="m.room.message",
+            event_id, relation_type="m.replace", event_type="m.room.message"
         )
         relation_ids = relation_chunk.to_dict()
 
diff --git a/tests/rest/client/v2_alpha/test_relations.py b/tests/rest/client/v2_alpha/test_relations.py
index c452cd965ab8..6a07ff802704 100644
--- a/tests/rest/client/v2_alpha/test_relations.py
+++ b/tests/rest/client/v2_alpha/test_relations.py
@@ -535,7 +535,8 @@ def test_aggregation_redaction_redacts_edits(self):
         # Redact the original
         request, channel = self.make_request(
             "PUT",
-            "/rooms/%s/redact/%s/%s" % (self.room, self.parent_id, "some_transaction_id"),
+            "/rooms/%s/redact/%s/%s"
+            % (self.room, self.parent_id, "some_transaction_id"),
             access_token=self.user_token,
         )
         self.render(request)
@@ -545,7 +546,8 @@ def test_aggregation_redaction_redacts_edits(self):
         # Try to check for remaining m.replace relations
         request, channel = self.make_request(
             "GET",
-            "/_matrix/client/unstable/rooms/%s/relations/%s/m.replace/m.room.message" % (self.room, self.parent_id),
+            "/_matrix/client/unstable/rooms/%s/relations/%s/m.replace/m.room.message"
+            % (self.room, self.parent_id),
             access_token=self.user_token,
         )
         self.render(request)