In a press conference on Wednesday UFC co-owner Lorenzo Fertitta and UFC president Dana White addressed concerns on drug testing after a spate of positive tests since the start of the year.
The pair announced that the UFC would be consulting with numerous drug agencies to establish an extended drug-testing protocol which will follow World Anti-Doping Association (WADA) standards.
Under WADA guidelines, first-time offenders will receive two-year bans, with a possible rise to four years in the future.
Such a suspension could potentially end a fighter's career, and MacDonald believes that this is the right stance to take.
"First of all, the fact that they're setting up this new era of drug testing, I think it's great," MacDonald told TSN.ca.
"I'm really impressed that they're taking the steps. They're making the punishments more severe which I totally agree with. That's going to influence guys to really get off it and start using skill and technique.
"I really would like to press, to really push and put pressure on the UFC to make this program of the new testing start for my fight against Robbie (Lawler) and the whole card July 11," he added.