diff --git a/test_api/apitest/callbacks.py b/test_api/apitest/callbacks.py
index f5ccd52..dee7a36 100644
--- a/test_api/apitest/callbacks.py
+++ b/test_api/apitest/callbacks.py
@@ -169,6 +169,7 @@ def play_live_item(rtc: object) -> None:
     aa = json.loads(ret.text)
     print_text(aa)
 
+
 def controller_item_show(rtc: object, payload: dict) -> None:
     id = payload['id']
     print_text('Controller_item_show')