Did Mayweather require his undercard fighters to undergo drug testing?

Did Goldenboy and/or Mayweather promotions require the fighters who fought on the undercard to the Floyd/Shane event to undergo rigorous drug testing? I assume that they must have as they have stated repeatedly that they're out to clean up the sport of boxing. Since they themselves chose these fighters to help fill out their event they could have easily stipulated that these fighters undergo the USADA blood and urine testing. However, if they didn't then what aspect of boxing do they wish to clean up? Do they only want their top tiered fighters and their opponents to be tested?