What if the testers never beat A4S? D:
Keeping in mind they probably had access to all the food, pots, etc. they needed and wouldn't be surprised if they could request testing specific parts of the fight (e.g., Leg 4 on) or cooldown resets, I'd see them getting it eventually in testing.
I'm more interested in knowing if they really though that was a good, solid fight and a great way to end the tier.