There in Texas where you live (aside from Austin) they don't take your rights as seriously as they do here in the Northeast (maybe with the exception of your right to own multiple fire arms.)
As I said, I know many many people who work for this district, and none of them have been tested. In fact, I worked for the district myself in another capacity for about two years, and testing was never an issue.

I'll keep you posted on my results. Say a prayer for me guys!