diff --git a/synapse/federation/transport/client.py b/synapse/federation/transport/client.py
index 2fcbb7069..d513c01b7 100644
--- a/synapse/federation/transport/client.py
+++ b/synapse/federation/transport/client.py
@@ -531,8 +531,8 @@ class TransportLayerClient(object):
             ignore_backoff=True,
         )
 
-    def update_room_group_association(self, destination, group_id, requester_user_id, room_id,
-                          content):
+    def update_room_group_association(self, destination, group_id, requester_user_id,
+                                      room_id, content):
         """Add a room to a group
         """
         path = PREFIX + "/groups/%s/room/%s" % (group_id, room_id,)
@@ -545,7 +545,8 @@ class TransportLayerClient(object):
             ignore_backoff=True,
         )
 
-    def delete_room_group_association(self, destination, group_id, requester_user_id, room_id):
+    def delete_room_group_association(self, destination, group_id, requester_user_id,
+                                      room_id):
         """Remove a room from a group
         """
         path = PREFIX + "/groups/%s/room/%s" % (group_id, room_id,)
diff --git a/synapse/groups/groups_server.py b/synapse/groups/groups_server.py
index c91d8e624..69831eacb 100644
--- a/synapse/groups/groups_server.py
+++ b/synapse/groups/groups_server.py
@@ -531,7 +531,8 @@ class GroupsServerHandler(object):
         })
 
     @defer.inlineCallbacks
-    def update_room_group_association(self, group_id, requester_user_id, room_id, content):
+    def update_room_group_association(self, group_id, requester_user_id, room_id,
+                                      content):
         """Add room to group
         """
         RoomID.from_string(room_id)  # Ensure valid room id
@@ -542,7 +543,9 @@ class GroupsServerHandler(object):
 
         is_public = _parse_visibility_from_contents(content)
 
-        yield self.store.update_room_group_association(group_id, room_id, is_public=is_public)
+        yield self.store.update_room_group_association(
+            group_id, room_id, is_public=is_public
+        )
 
         defer.returnValue({})