He never failed a test in competition.
Conversely, Bolt's Country rarely if ever tests him. Multiple top Jamaican sprinters, including Bolt's own training partner; tested positive for banned substances. Fwiw, I concluded that Bolt was dirty when another Jamaican sprinter, Asafa Powell failed a drug test.
Powell who is "6'3" ran a 9.72; 9.74 and 9.77 in the 100. Those were World records at that time and that 9.72 still stands as the 5th fastest time ever. Powell has broke the 10 seconds barrier 95 times; which is more times than any other runner ever.
It took them a long time to catch Asafa Powell doping too; but they caught him.
Asafa Powell - Wikipedia, the free encyclopedia