diff --git a/tests/unit/test_smart_match_noise_1743.py b/tests/unit/test_smart_match_noise_1743.py
index ab1c7bc3c..03b035351 100644
--- a/tests/unit/test_smart_match_noise_1743.py
+++ b/tests/unit/test_smart_match_noise_1743.py
@@ -84,8 +84,9 @@ class TestScoreNoiseInjection:
 
     def test_score_field_is_raw_without_noise(self):
         """r.score 始终是无噪声原始分（噪声只影响排序，不污染返回分值）。"""
-        from unittest.mock import patch
         from datetime import datetime as _dt
+        from unittest.mock import patch
+
         assets = _make_tied_assets(5)
         raw_scores = {score_asset(a, now=NOW)[0] for a in assets}
         # 冻结 datetime.now，与 score_asset 用的 NOW 一致（recency 时变分数需稳定）