I'm curious, you are on TRT so why would a drug test be of concern?
But I have never really heard for drug testing of adex, there is no real reason to do so as it is not a recreational drug and doesn't give a clear cut steroid-use indication either...
T depends on the ester and they have to individually test for T itself, but Test Enanthate is detectable upto 3 months IIRC. Prop is 1 months I think?