The prime minister is putting the final touches to his new-look frontbench, but won't be making radical changes to the ministry team.
Prime Minister Scott Morrison could announce his new cabinet line-up as early as Sunday following the government's surprise federal election win last weekend.
Senior government minister Simon Birmingham says Mr Morrison has been taking his time choosing his new-look ministry after last weekend's surprise federal election win.
"These are never easy decisions for prime ministers in terms of crafting the best cabinet for the future," Senator Birmingham told Sky News on Sunday.
Mr Morrison is expected to announce his new team later on Sunday in Canberra amid reports Communications Minister Mitch Fifield and Environment Minister Melissa Price will be dumped.
"I feel for any colleague that may miss out in such a process but the PM has to do what is right," Senator Birmingham said, while not confirming who may be in or out of the mix.
Mathias Cormann is expected to stay in the Finance portfolio but was coy on the issue.
"I am very happy to serve whatever capacity the prime minister sees fit."
Home Affairs Minister Peter Dutton and Treasurer Josh Frydenberg are also set to stay in the same roles.
However, the retirement of Christopher Pyne, Nigel Scullion and Kelly O'Dwyer at the election has opened up three positions in the 22-strong cabinet.
Liberal MPs Alan Tudge, Michael Sukkar, Scott Buchholz, Anne Ruston and Sussan Ley are all thought to be in the mix for promotion.
Attorney-General Christian Porter is expected to add Leader of the House to his workload, 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.