diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index 997bb0cd81..132a8fb5e6 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -342,7 +342,11 @@ class BaseFederationServlet(object):
                 continue
 
             server.register_paths(
-                method, (pattern,), self._wrap(code), self.__class__.__name__, trace=False
+                method,
+                (pattern,),
+                self._wrap(code),
+                self.__class__.__name__,
+                trace=False,
             )