This is the mystery and NOBODY has ever answered it, in spite of all the theories and speculation.
I've always felt that ANY androgen would show an elevated T level. DIanabol isn't testosterone but a blood test would detect an increased T level while on it. That's a fact. I was always curious about Primo because it isn't as strong an androgen , But....ALL STEROIDS ARE BASEd ON THE TESTOSTERONE MOLECULE.
The next question would be if a deca only cycle would do the same thing.
It's amazing that after all these years and all the pontificating from all the guru's, no one has actually done this -- until now.