Team-mate Sam Pinder will also start at McDiarmid Park on Tuesday night (ko 7.30pm). Another Warrior, Graeme Beveridge, will takes Sam's place among Scotland A's replacements.
The move comes as Rory Lawson and Alasdair Strokosch have been added to the Scotland squad for Saturday's Test against Australia at Murrayfield. They replace respectively the injured Chris Cusiter and John Beattie.