Well, maybe. I think test flu is from either high levels of BA or EO. So if you make the gear exactly like what you have been using, then you will get test flu again in all likelihood.
A lower % of BA and using BB and grapeseed oil has been the best for me. No inject pain and no test flu.
If you have used human grade and not gotten test flu, assuming you could replicate their mixture and you were sterile, then you should be gtg.