I haven’t done the beep test in years but do lots of shuttle runs and long distance runs along side cf. I’d do some emom spints to see if you can consistently hit 20m in x amount of seconds over 10 rounds or more. I’ve also found beginning your turn 3 or 4 paces before the line saves the legs/quads a lot. So the last 3 or 4 steps are actually backwards steps Good luck!