Wales are confident of upsetting Australia on Sunday after seeing the world champions struggle against England A.
Anthony Farrell will retire at the end of the season
The Kangaroos have not lost a tour match for 25 years but were forced to hang on grimly as they recorded a 26-22 win at Griffin Park.
"I was a little bit surprised that, once Australia got to 26-6, they allowed England back into the game," said Wales coach Neil Kelly.
"But I don't think they are as formidable at the moment as they have been in the past and in the last 10 minutes it wouldn't have surprised me to see England snatch the victory."
Australia, who suffered a surprise defeat by New Zealand earlier this month, have only Sunday's match to fine tune their game before the Think! Road Safety Series begins in Wigan on 8 November.
"The Australians seem to be lacking a game-breaker in the mould of Mal Meninga or Brad Fittler and we've got a good recent record against them," said Wales team manager Mike Nicholas.
"That gives us some confidence for Sunday's game. I was impressed with the English performance and it was obvious that Australia are not on the top of their game yet.
"We've got to be aware of the backlash that may arise but we're relishing the occasion. We aim to give the Welsh fans something to cheer about."
Veteran former Widnes, Leeds and Sheffield Eagles forward Anthony Farrell, who is retiring at the end of the season, is poised to win his seventh cap at the Brewery Field.
The 34-year-old Farrell is one of seven survivors from the Welsh team that lost 46-22 to Australia in their last meeting, the 2000 World Cup semi-final.
Widnes prop David Mills is also expected back from a jaw injury but second rower Dean Busby is out with a shoulder injury and skipper Lee Briers is still waiting for the specialist's all-clear from a broken wrist.