Papua New Guinea are determined to go one step better in Sunday's clash than last year's 24-24 draw with the Prime Minister's XIII.

The fourth annual Prime Minister's challenge will be held in Port Moresby and is a preliminary run as players chase selection for next month's World Cup.

While Australia dominates world rugby league, league-mad PNG are thinking long-term not just about Sunday's big clash.

PNG rugby league boss Danny Holmes said the Kumuls have improved dramatically in skill, discipline and physically are stronger than ever.

"There's a real confidence these days with the team," he told AAP.

"It's what we've been working on and preparing for so the players know that not only as they improve with experience and skill but mentally they are focused for winning against tough competition like the Australians," he said.

Holmes said the Australian Rugby League's continued support with coaching and refereeing programs have raised standards and strengthened PNG's goal to see a club side one day entering the NRL.

"A draw last year was brilliant and really boosted their confidence, this year everyone is hoping to go one step better," he said.

But Prime Minister's XIII coach Mal Meninga said at an official reception on Friday night that his side was ready to disappoint all those loyal PNG supporters.

"The boys are ready to go and are really going to take it to them," he said.

Kick off on Sunday is scheduled for 3pm (AEST).

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