diff --git a/tests/unit/test_asset_library_use_cases.py b/tests/unit/test_asset_library_use_cases.py
index 2fa9be82e..bbc88796a 100755
--- a/tests/unit/test_asset_library_use_cases.py
+++ b/tests/unit/test_asset_library_use_cases.py
@@ -1,4 +1,5 @@
 """素材库 + 素材 UseCase 单元测试（P3-1 第31波）。"""
+
 from __future__ import annotations
 
 from unittest.mock import MagicMock
@@ -17,7 +18,6 @@ from packages.application.assets import (
 )
 from packages.domain import AssetLibraryKind, AssetStatus, ClassificationStatus
 
-
 # ── ListAssetLibrariesUseCase ────────────────────────────────────────────────
 
 
diff --git a/tests/unit/test_bgm_config_merge.py b/tests/unit/test_bgm_config_merge.py
index eb823c2f5..9ff12c5d7 100755
--- a/tests/unit/test_bgm_config_merge.py
+++ b/tests/unit/test_bgm_config_merge.py
@@ -1,4 +1,5 @@
 """BGM配置合并逻辑单元测试。"""
+
 import pytest
 
 from packages.domain.bgm_utils import merge_bgm_config
diff --git a/tests/unit/test_project_use_cases.py b/tests/unit/test_project_use_cases.py
index 153ec1566..f4b33bbfa 100755
--- a/tests/unit/test_project_use_cases.py
+++ b/tests/unit/test_project_use_cases.py
@@ -1,4 +1,5 @@
 """Project 领域模型 + UseCase 单元测试（P3-1 第30波）。"""
+
 from __future__ import annotations
 
 from unittest.mock import MagicMock
@@ -16,7 +17,6 @@ from packages.application.projects import (
 )
 from packages.domain.entities import Project
 
-
 # ── Project 领域模型 ────────────────────────────────────────────────────────