Retest ftp during 12week ftp workout?

hi guys… Hope your all enjoying Zwift as much as I’ve enjoyed it since starting last month.  I was wondering if anybody doing the 12 week ftp program retests their ftp during the 12 weeks, or do you wait until the entire 12 weeks is complete before retesting? 

I’ve just started (straight in at week 3) and was wondering the same.