being too dillute can automatically result in a the lab marking the specifim as a 'positive result, but at least if you get a dillute positive, you have to given a chance to retest I believe. Can Just blame it on a shy bladder, and just always drinking plenty of waterso you can be sure to not have to wait around for hours to be able to go, and not knowing anything about drug tests, especially that it wasnt allowed to drink plenty of fluids.