diff --git a/synapse/handlers/e2e_keys.py b/synapse/handlers/e2e_keys.py
index e1775a5263..1df1f85c4e 100644
--- a/synapse/handlers/e2e_keys.py
+++ b/synapse/handlers/e2e_keys.py
@@ -27,12 +27,7 @@ from unpaddedbase64 import decode_base64
 
 from twisted.internet import defer
 
-from synapse.api.errors import (
-    CodeMessageException,
-    Codes,
-    NotFoundError,
-    SynapseError,
-)
+from synapse.api.errors import CodeMessageException, Codes, NotFoundError, SynapseError
 from synapse.logging.context import make_deferred_yieldable, run_in_background
 from synapse.logging.opentracing import log_kv, set_tag, tag_args, trace
 from synapse.replication.http.devices import ReplicationUserDevicesResyncRestServlet