diff --git a/tests/unit/mcp/test_mcp_tools.py b/tests/unit/mcp/test_mcp_tools.py
index 0064ed9aa..f0a7631e8 100644
--- a/tests/unit/mcp/test_mcp_tools.py
+++ b/tests/unit/mcp/test_mcp_tools.py
@@ -370,7 +370,9 @@ async def test_mobile_get_device_state_hierarchy_without_ocr():
 
 
 @pytest.mark.asyncio
-async def test_mobile_inspect_trace_invalid_action():
+async def test_mobile_inspect_trace_invalid_action(temp_trace_env):
+    Path(temp_trace_env, "data_engine.db").touch()
+
     res = await mobile_inspect_trace(action="invalid_action", trace_id="trace-123")
     assert "error" in res
     assert "not supported" in res["message"]