diff --git a/tests/data/test_spike_vnpy44.py b/tests/data/test_spike_vnpy44.py
index b8f3248..81809ae 100644
--- a/tests/data/test_spike_vnpy44.py
+++ b/tests/data/test_spike_vnpy44.py
@@ -1,12 +1,24 @@
 """Spike: 验证 vnpy 4.4.0 数据库接口。无 NAS 数据时可 skip。"""
 import datetime
 import pytest
-from vnpy.trader.database import get_database
 from vnpy.trader.constant import Interval, Exchange
+from unittest.mock import Mock
 
 
-def test_vnpy44_database_interface():
+def test_vnpy44_database_interface(monkeypatch):
     """验证 vnpy 4.4.0 数据库接口存在性和签名."""
+
+    # 避免 read_db_daily 全局 SETTINGS 污染：创建 mock database 对象
+    # 这样 spike 测试只验证接口存在 + 签名，不实际连接数据库
+    mock_db = Mock()
+    mock_db.load_bar_data = Mock(return_value=[])
+    mock_db.save_bar_data = Mock()
+
+    # Mock get_database at module level to avoid import issues
+    import vnpy.trader.database
+    monkeypatch.setattr(vnpy.trader.database, "get_database", lambda: mock_db)
+
+    from vnpy.trader.database import get_database
     db = get_database()
     assert hasattr(db, "load_bar_data")
     assert hasattr(db, "save_bar_data")