diff --git a/apps/worker/worker_app/tasks/edit_plan_generation.py b/apps/worker/worker_app/tasks/edit_plan_generation.py
index 97f39ef82..729a202ce 100644
--- a/apps/worker/worker_app/tasks/edit_plan_generation.py
+++ b/apps/worker/worker_app/tasks/edit_plan_generation.py
@@ -247,6 +247,7 @@ def _render_with_unified(
     # 不能用 output.mp4 硬编码，否则 cover 等下游通过 key 构造的 URL 指向不存在的文件
     if output_url:
         from packages.shared.storage import get_shared_storage_service
+
         storage_key = get_shared_storage_service().normalize_storage_key(output_url)
     else:
         storage_key = f"rendered/{plan_id}/{generation_task_id or plan_id}.mp4"
diff --git a/tests/unit/test_mediakit_cover.py b/tests/unit/test_mediakit_cover.py
index 51c80eec7..d48d65834 100755
--- a/tests/unit/test_mediakit_cover.py
+++ b/tests/unit/test_mediakit_cover.py
@@ -342,4 +342,3 @@ class TestGenerateCover:
         assert result["type"] == "ai_frame"
         call_kwargs = mock_cover_service.call_args[1]
         assert call_kwargs["primary_video_url"] is None
-