diff --git a/nonebot_plugin_nagabus/naga/fake_api.py b/nonebot_plugin_nagabus/naga/fake_api.py
index d5eb2a2..65ed9e2 100644
--- a/nonebot_plugin_nagabus/naga/fake_api.py
+++ b/nonebot_plugin_nagabus/naga/fake_api.py
@@ -36,7 +36,7 @@ async def close(self):
 
     async def set_cookies(self, cookies: Mapping[str, str]):
         logger.info(
-            f"naga_cookies set to {'; '.join((f'{kv[0]}={kv[1]}' for kv in cookies))}"
+            f"naga_cookies set to {'; '.join(f'{kv[0]}={kv[1]}' for kv in cookies)}"
         )
 
     async def order_report_list(self, year: int, month: int) -> OrderReportList: