diff --git a/tests/integration/test_full_pipeline.py b/tests/integration/test_full_pipeline.py
index 97104e537..70307d4a1 100644
--- a/tests/integration/test_full_pipeline.py
+++ b/tests/integration/test_full_pipeline.py
@@ -57,6 +57,7 @@ def _generate_test_audio(path: Path, duration: float = 5.0) -> None:
     ]
     subprocess.run(cmd, check=True, capture_output=True, timeout=30)
 
+
 class TestFullPipeline:
     """验证从虚拟 plan 构建到渲染输出的完整流程。"""