diff --git a/tests/web/test_websocket_server.py b/tests/web/test_websocket_server.py
index 49405e8..4df1f66 100644
--- a/tests/web/test_websocket_server.py
+++ b/tests/web/test_websocket_server.py
@@ -14,6 +14,7 @@ from transactions.types.assets.create import Create
 from transactions.types.assets.transfer import Transfer
 from ipld import multihash, marshal
 
+
 class MockWebSocket:
     def __init__(self):
         self.received = []