Job testing, bleach?

My manager told us on Friday that he would be giving each of us a drug test sometime within the next 2 weeks. Good news is they're the home test kind, he showed us a big stack of them he bought from Wal-mart, they're called First Check. Is their anything I can add to the test to test negative? I've heard that a few drops of bleach will work, does anyone know for sure?

Thank ya.

No, I don't think bleach will be effective. In fact anything added to your urine will probably screw you.

Just have someone else piss for you.