Aircraft test flights are carefully planned and rigidly followed. I seriously doubt they departed from the flight plan significantly.
Its astounding that this far into the program they are only now getting to this phase.
I’m not. People keep thinking of the F-35 as a fighter; a stealthy F-16. It isn’t any such thing, is closer to a stealthy A-7. But the “A” suffix is very out of vogue these days.