diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py
index 47c7aedff..502ff1512 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -586,7 +586,8 @@ class MatrixFederationHttpClient(object):
         }
 
         response = yield self._send_request_with_optional_trailing_slash(
-            request, try_trailing_slash_on_400, backoff_on_404, send_request_args)
+            request, try_trailing_slash_on_400, backoff_on_404, send_request_args,
+        )
 
         body = yield _handle_json_response(
             self.hs.get_reactor(), self.default_timeout, request, response,
@@ -706,7 +707,8 @@ class MatrixFederationHttpClient(object):
         }
 
         response = yield self._send_request_with_optional_trailing_slash(
-            request, try_trailing_slash_on_400, **send_request_args)
+            request, try_trailing_slash_on_400, send_request_args,
+        )
 
         body = yield _handle_json_response(
             self.hs.get_reactor(), self.default_timeout, request, response,