diff --git a/tests/unit/test_extract_from_douyin_errors.py b/tests/unit/test_extract_from_douyin_errors.py
index ef8d75786..f880ce858 100644
--- a/tests/unit/test_extract_from_douyin_errors.py
+++ b/tests/unit/test_extract_from_douyin_errors.py
@@ -103,9 +103,7 @@ def test_mediakit_asr_success(fake_user):
 
     with _fake_resolver_success(desc="Feed标题"):
         with _fake_mk_available(text="这是MediaKit识别的文案", duration=12.5):
-            result = scripts_ai.extract_from_douyin(
-                request=body, current_user=fake_user, db=mock.MagicMock()
-            )
+            result = scripts_ai.extract_from_douyin(request=body, current_user=fake_user, db=mock.MagicMock())
     assert result.text == "这是MediaKit识别的文案"
     assert result.duration_seconds == 12.5
 
@@ -121,9 +119,7 @@ def test_share_text_input_extracts_url_correctly(fake_user):
 
     with _fake_resolver_success():
         with _fake_mk_available(text="识别成功的文案", duration=5.0) as mk_mock:
-            resp = scripts_ai.extract_from_douyin(
-                request=body, current_user=fake_user, db=mock.MagicMock()
-            )
+            resp = scripts_ai.extract_from_douyin(request=body, current_user=fake_user, db=mock.MagicMock())
     assert resp.source_url == "https://v.douyin.com/abcdeFG/"
     assert resp.text == "识别成功的文案"
     assert resp.duration_seconds == 5.0
@@ -163,9 +159,7 @@ def test_asr_empty_falls_back_to_desc(fake_user):
                 "app.api.routes.scripts_ai._direct_url_download_and_local_asr",
                 return_value=("", 0.0),
             ):
-                resp = scripts_ai.extract_from_douyin(
-                    request=body, current_user=fake_user, db=mock.MagicMock()
-                )
+                resp = scripts_ai.extract_from_douyin(request=body, current_user=fake_user, db=mock.MagicMock())
     assert resp.text == "Feed描述文案"
 
 
@@ -186,9 +180,7 @@ def test_asr_not_configured_returns_503(fake_user):
                 side_effect=HTTPException(status_code=503, detail="ASR未配置"),
             ):
                 with pytest.raises(HTTPException) as exc:
-                    scripts_ai.extract_from_douyin(
-                        request=body, current_user=fake_user, db=mock.MagicMock()
-                    )
+                    scripts_ai.extract_from_douyin(request=body, current_user=fake_user, db=mock.MagicMock())
                 assert exc.value.status_code == status.HTTP_503_SERVICE_UNAVAILABLE
 
 
@@ -216,9 +208,7 @@ def test_asr_transcription_failure_returns_502(fake_user):
                 side_effect=HTTPException(status_code=502, detail="语音识别失败"),
             ):
                 with pytest.raises(HTTPException) as exc:
-                    scripts_ai.extract_from_douyin(
-                        request=body, current_user=fake_user, db=mock.MagicMock()
-                    )
+                    scripts_ai.extract_from_douyin(request=body, current_user=fake_user, db=mock.MagicMock())
                 assert exc.value.status_code == status.HTTP_502_BAD_GATEWAY
 
 
@@ -237,7 +227,5 @@ def test_download_timeout_returns_504(fake_user):
                 side_effect=HTTPException(status_code=504, detail="视频下载超时"),
             ):
                 with pytest.raises(HTTPException) as exc:
-                    scripts_ai.extract_from_douyin(
-                        request=body, current_user=fake_user, db=mock.MagicMock()
-                    )
+                    scripts_ai.extract_from_douyin(request=body, current_user=fake_user, db=mock.MagicMock())
                 assert exc.value.status_code == status.HTTP_504_GATEWAY_TIMEOUT
diff --git a/tests/unit/test_scripts_ai.py b/tests/unit/test_scripts_ai.py
index 6b3e60dc4..1b71d0ac1 100644
--- a/tests/unit/test_scripts_ai.py
+++ b/tests/unit/test_scripts_ai.py
@@ -49,6 +49,7 @@ def _mock_resolver(
 ):
     """Mock resolve_douyin_video 返回 ResolveResult。"""
     from app.services.douyin_resolver import ResolveResult
+
     return ResolveResult(video_url=video_url, desc=desc, source=source)