diff --git a/agent-office/tests/test_lotto_signal_runner.py b/agent-office/tests/test_lotto_signal_runner.py
index beb968e..42e3809 100644
--- a/agent-office/tests/test_lotto_signal_runner.py
+++ b/agent-office/tests/test_lotto_signal_runner.py
@@ -15,6 +15,8 @@ import pytest
 from app.curator import signal_runner
 from app import db
 
+db.DB_PATH = _TMP  # patch frozen module-level DB_PATH (import order safety)
+
 
 @pytest.fixture(autouse=True)
 def fresh_db():