Quick C41 chemical test

[elerion]

I reciently lost a roll I developed on C41 gone bad. It came out totally transparent, by the action of the blix on the undeveloped film I suppose.

I made fresh developer from an opened concentrate, and it works great again. But I will like to know if there's a quick way to test if the developer still works, not requiring to go through all steps with a test strip (it takes quite a long time heating and doing all manually), neither loosing a full roll again 😀

Thanks!