Ex-NRL player Marika Koroibete and Waratahs back-rower Jack Dempsey are among the bolters for the Wallabies' spring tour next month.

Queensland centre Izaia Perese and prop Taniela Tupou also look set for dream call ups, as Australian coach Michael Cheika tries to put behind him a horror 30 per cent win ratio this season and build for the future.

It is understood that Rebels recruit Koroibete, who was a standout in the Melbourne Storm's run to the NRL grand final this year, is the only one of the four who will be named in the official squad, while the other three will be taken as development players after standout performances in the National Rugby Championship this year.

Koroibete let the cat out of the bag last month when he confessed Cheika had used a spring tour appearance as a carrot to make the code switch.