The Turnbull government will reduce the amount of time foreign workers on 457 visas can stay in Australia following their employment, in a bid to tip the scales back in favour of Australian jobseekers.

Hot on the heels of Labor's proposed 457 visa crackdown, foreign workers on 457 visas will now be allowed to remain in the country for only 60 days after the cessation of their employment, instead of 90.

Immigration Minister Peter Dutton said the change, to begin on Saturday, would limit visa holders' ability to look for another job or enter informal work arrangements after their official employment had ended.

"This change is about reducing competition from overseas workers for those Australians who are actively looking for work," Mr Dutton said on Wednesday.