If user story includes dev sub task and QE sub task, how to present the correct status in CFD?

[lingyun_yao]

Since right now the team leverages dev sub task and QE sub task to track the progress of the user story. And once the user story finishes all the sub tasks, it can be set as "Resolved".  And once it's accepted by PO/Arch, it'll be turned to "Done".

So there's no status for user story to indicate the start/duration of test, looks there's no opportunity to show "Test" in Cumulative Flow Diagram. 

Any help would be appreciated!