Working ladies-do you test for ovulation at work?!

So I've been using OPKs at 2 pm, but once I go back to work, I won't be getting home until 4:30 pm. I have started testing in the morning (10:30) as well as in the afternoon. However, I'm not sure how this will work when I go back to work? Do you just bring a test to work and test there for your AM test? Or do you just test with FMU before you go to work?