How do you mean "Tested"?
Cruz has not had the rectal exam that was given to Walker and his family over the years.
If Cruz, his wife or family have any issues, you know they will find it and exploit it. Remember Perry getting crucified over "Niggerhead Ranch" sign or Herman Cain's DNC accuser?
It is those things where Cruz has not been vetted. Imagine finding something about his heritage, family's work in oil or his wife's work at Goldman Sachs? You know these things do not have to be legitimate to gain traction with voters.