diff --git a/tests/unit/test_unified_render_service.py b/tests/unit/test_unified_render_service.py
index a6d99cec7..18de7cea3 100755
--- a/tests/unit/test_unified_render_service.py
+++ b/tests/unit/test_unified_render_service.py
@@ -1068,13 +1068,23 @@ class TestAudioMixing:
         from video_processing.unified_render_service import ResolvedClip
 
         main = ResolvedClip(
-            clip_id="c1", asset_id="asset_c1", clip_type="main", order=0,
-            local_path=Path("/tmp/asset_c1.mp4"), duration=5.0, actual_duration=5.0,
+            clip_id="c1",
+            asset_id="asset_c1",
+            clip_type="main",
+            order=0,
+            local_path=Path("/tmp/asset_c1.mp4"),
+            duration=5.0,
+            actual_duration=5.0,
             config={},
         )
         aud = ResolvedClip(
-            clip_id="bgm1", asset_id="asset_bgm1", clip_type="main", order=1,
-            local_path=Path("/tmp/asset_bgm1.mp4"), duration=5.0, actual_duration=5.0,
+            clip_id="bgm1",
+            asset_id="asset_bgm1",
+            clip_type="main",
+            order=1,
+            local_path=Path("/tmp/asset_bgm1.mp4"),
+            duration=5.0,
+            actual_duration=5.0,
             config={"volume": 0.5},
         )
         ctx = _make_ctx()