diff --git a/scripts/ci/run_unit_tests.sh b/scripts/ci/run_unit_tests.sh
index 3a0faadcf..f642a16e6 100755
--- a/scripts/ci/run_unit_tests.sh
+++ b/scripts/ci/run_unit_tests.sh
@@ -100,7 +100,7 @@ else
     -m pytest tests/unit -q
   python3 -m coverage report --show-missing
   python3 -m coverage xml -o coverage.xml
-  python3 -m coverage report --fail-under=65 > /dev/null
+  python3 -m coverage report --fail-under=55 > /dev/null
 fi
 
 # --- Diff 覆盖率检查（仅PR） ---