diff --git a/tests/unit/test_editor_clips_random_start.py b/tests/unit/test_editor_clips_random_start.py
index 1b28c38e7..d3fb9a1ee 100644
--- a/tests/unit/test_editor_clips_random_start.py
+++ b/tests/unit/test_editor_clips_random_start.py
@@ -144,6 +144,7 @@ class TestEditorClipsBySegments:
 
         # 验证均衡分配（贪心策略保证）：2个素材分4个片段，每个素材恰好使用2次
         from collections import Counter
+
         asset_ids = [c["asset_id"] for c in clips_data]
         counts = Counter(asset_ids)
         assert counts["a1"] == 2 and counts["a2"] == 2
diff --git a/tests/unit/test_mediakit_smart_clips.py b/tests/unit/test_mediakit_smart_clips.py
index 4f19ca234..edf3d18a6 100644
--- a/tests/unit/test_mediakit_smart_clips.py
+++ b/tests/unit/test_mediakit_smart_clips.py
@@ -477,6 +477,7 @@ class TestFromAssetsByTemplateSegments:
         asset_ids = [c["asset_id"] for c in clips_data]
         # 贪心分配保证均衡：2个素材分4个片段，每个素材恰好使用2次
         from collections import Counter
+
         counts = Counter(asset_ids)
         assert counts["a1"] == 2 and counts["a2"] == 2