Ive run Tren plenty of times without test back in the day. Did just fine less some mental misbehavior lol
These genral rules of thumb are for just that, general guidelines for the general population
Now that said, many swear they will never run Ten w/o Test ever again due to horrible mood and/or libido issues.
Currently, now that Im an old turd, I would suggest the same to be prudent but it's not "needed" per se for anything magical.
My tren-solo runs were SICK....I was also an emotional WRECK too
So, good luck