1 files changed, 3 insertions, 3 deletions
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index 0a2ff75629..2f52f2a8f2 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -599,9 +599,9 @@ class RoomMemberHandler(object):
 
         if requester is not None:
             sender = UserID.from_string(event.sender)
-            assert sender == requester.user, (
-                "Sender (%s) must be same as requester (%s)" % (sender, requester.user)
-            )
+            assert (
+                sender == requester.user
+            ), "Sender (%s) must be same as requester (%s)" % (sender, requester.user)
             assert self.hs.is_mine(sender), "Sender must be our own: %s" % (sender,)
         else:
             requester = synapse.types.create_requester(target_user)