Cool. I wish my work required a fit test. (Except that I'd be about the only one left in the office afterwards...)
Anyway, I'd switch things around and do more strength training and less running. My 8-day rotation would include:
1 "long" run day (3 miles, moderate pace) plus the bodyweight exercises to be tested
1 sprint day (8x 100-meter hill sprints)
2 bodyweight days (including variations on the exercises to be tested, but harder variations -- ie L-sits, not crunches, for abs)
1 heavy lifting day (bench press, military press, backsquat, deadlift)
3 rest days
I'd throw in one of those rest days after the heavy day, and 2 in a row after the long run day. Also, after the test, I'd back off a little.
Curious as to what you believe your weakest point to be...