diff --git a/cloud/autoscaler.py b/cloud/autoscaler.py
index 20e19f2..fdd72e7 100644
--- a/cloud/autoscaler.py
+++ b/cloud/autoscaler.py
@@ -384,7 +384,7 @@ def main(argv=None):
         print("autoscaler 需要 --db（或 worker 参数里的 --db）",
               file=sys.stderr)
         raise SystemExit(2)
-    setup_logging("cloud.autoscaler")
+    setup_logging()
     scaler = Autoscaler(
         db_path, worker_args, min_workers=args.min_workers,
         max_workers=args.max_workers,
diff --git a/cloud/tests/test_autoscaler.py b/cloud/tests/test_autoscaler.py
index 24b072c..d69834a 100644
--- a/cloud/tests/test_autoscaler.py
+++ b/cloud/tests/test_autoscaler.py
@@ -160,6 +160,22 @@ class AutoscalerReconcileTestCase(unittest.TestCase):
         self.assertIn("--db", cmd)
         self.assertEqual(cmd[cmd.index("--db") + 1], self.db_path)
 
+    def test_main_parses_args_and_starts_loop(self):
+        # 回归：main() 里 setup_logging 曾错传 logger 名当 level，
+        # 直接 ValueError，scaler 在主机上 crash-loop、一个 worker
+        # 都没拉起来。本测试 mock 掉 run_loop 与 signal，只验证
+        # main() 能走到启动循环（即参数解析与日志初始化没炸）。
+        from unittest import mock
+
+        import cloud.autoscaler as autoscaler_mod
+        with mock.patch.object(
+                autoscaler_mod.Autoscaler, "run_loop") as mock_loop, \
+                mock.patch("signal.signal"):
+            autoscaler_mod.main([
+                "--db", self.db_path, "--interval", "30",
+                "--", "--interval", "10"])
+        mock_loop.assert_called_once()
+
 
 if __name__ == "__main__":
     unittest.main()