Every fighter on the UFC 189: Mendes vs. McGregor fight card on July 11 drug tested on fight night. Seven fighters were also tested out-of-compeition. All test results came back clean, although not without come controversy swirling around a Jose Aldo test collection prior to him dropping off the card.
The rest is here:
UFC 189 Drug Test Results All Clean, Jose Aldo’s Troublesome Test Collection Detailed – MMA Weekly