diff --git a/tests/unit/test_ai_service.py b/tests/unit/test_ai_service.py
index a201dd647..d505a3daf 100755
--- a/tests/unit/test_ai_service.py
+++ b/tests/unit/test_ai_service.py
@@ -18,8 +18,8 @@ from unittest.mock import MagicMock, patch
 sys.path.insert(0, "apps/api")
 
 from app.services.ai_service import (  # noqa: E402
-    DoubaoAIClient,
     TITLE_STYLES,
+    DoubaoAIClient,
     _generate_titles_fallback,
     _parse_titles_from_response,
     generate_smart_titles,