diff --git a/tests/test_api_health.py b/tests/test_api_health.py
index 95cd8c6..4d16293 100644
--- a/tests/test_api_health.py
+++ b/tests/test_api_health.py
@@ -46,12 +46,30 @@ def test_manual_agent_run_endpoint_starts_background_job(monkeypatch) -> None:
     monkeypatch.setenv("SIGNALSCOUT_ENV", "test")
     get_settings.cache_clear()
     started = []
+    engine = create_engine(
+        "sqlite:///:memory:",
+        connect_args={"check_same_thread": False},
+        poolclass=StaticPool,
+        future=True,
+    )
+    TestingSessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False, future=True)
+    Base.metadata.create_all(engine)
 
     def fake_run_scheduled_job(settings):
         started.append(settings.env)
 
+    def override_get_db():
+        # 手动搜索测试只验证接口调度行为，运行中状态查询使用内存库。
+        db = TestingSessionLocal()
+        try:
+            yield db
+        finally:
+            db.close()
+
     monkeypatch.setattr("app.api.routes.run_scheduled_job", fake_run_scheduled_job)
-    with TestClient(create_app()) as client:
+    app = create_app()
+    app.dependency_overrides[get_db] = override_get_db
+    with TestClient(app) as client:
         response = client.post("/agent/runs/daily")
     get_settings.cache_clear()