diff --git a/tests/handlers/test_e2e_keys.py b/tests/handlers/test_e2e_keys.py
index 8c0ee3f7d3..c900451e03 100644
--- a/tests/handlers/test_e2e_keys.py
+++ b/tests/handlers/test_e2e_keys.py
@@ -19,6 +19,7 @@ import mock
 
 import signedjson.key as key
 import signedjson.sign as sign
+
 from twisted.internet import defer
 
 import synapse.handlers.e2e_keys