Scott Morrison is not expected to make major changes to his team of ministers when he announces the post-election line-up this weekend.
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Christopher Pyne, Nigel Scullion and Kelly O'Dwyer retired at the election, opening up three positions in the 22-strong cabinet.
There is speculation promotion could be on the cards for Liberal MPs Alan Tudge, Michael Sukkar, Scott Buchholz, Anne Ruston and Sussan Ley, who was health minister from 2014 to 2017 and an assistant minister under Mr Morrison.
Peter Dutton is expected to keep Home Affairs, while Treasurer Josh Frydenberg and Finance Minister Mathias Cormann are also set to stay in the same roles.
Attorney-General Christian Porter will be Leader of the House, replacing Mr Pyne in managing the day-to-day of parliament tactics.
Health Minister Greg Hunt, Education Minister Dan Tehan and Foreign Minister Marise Payne are likely to keep their spots.
West Australian minister Ken Wyatt is tipped to take on indigenous affairs, becoming the first indigenous Australian to hold the role - a priority policy area for the prime minister over the coming term.
There is speculation Environment Minister Melissa Price's portfolio could be scaled back, but she will keep the job.
A rise in Liberal MP numbers is expected to push down the quota of Nationals ministers in the cabinet from five to four, which is calculated on a proportional basis.
This would leave Deputy Prime Minister Michael McCormack, Nationals deputy leader Bridget McKenzie, David Littleproud and Matt Canavan in cabinet.
Australian Associated Press