diff --git a/tests/unit/test_unified_render_service.py b/tests/unit/test_unified_render_service.py
index dfe942760..6a274012a 100755
--- a/tests/unit/test_unified_render_service.py
+++ b/tests/unit/test_unified_render_service.py
@@ -2314,7 +2314,7 @@ class TestVoiceoverTopLevelConfigBridge:
 
         assert result is True, "顶层 voice_id + custom_text 应触发 TTS 配音"
         # 应有 audio 图层
-        audio_layer = next((l for layer in layers if l.role == "audio"), None)
+        audio_layer = next((layer for layer in layers if layer.role == "audio"), None)
         assert audio_layer is not None, "应添加 audio 图层"
         assert len(audio_layer.clips) == 1, "应有 1 个配音片段"
 
@@ -2395,4 +2395,4 @@ class TestVoiceoverTopLevelConfigBridge:
 
         assert result is False
         # 没有 audio 图层
-        assert not any(l.role == "audio" for layer in layers)
+        assert not any(layer.role == "audio" for layer in layers)