Should I re-test or change FTP?

Thanks for the responses!

I am 3 weeks into the program. Definitely noticing changes and gains, so really enjoying it.

I have found in a lot of the past workouts wanting to turn up the intensity when working in sweet spot, or upping the watts during the rest intervals. That being said, I have had issues in the past being impatient about resting. I’m just not 100% sure what sweet spot should really feel like since this is my first structured program.

Also it seems like it would be a bad idea to do a ramp rest in the middle of high TSS, or am I wrong?

So far sounds like I should just stick to it until reassessment at the beginning of build phase.