Steve Clarke has made six changes to his Scotland squad as they prepare for friendlies against Iceland and Liechtenstein in early June.
As many as seven uncapped players will be present for the visit of Iceland to Hampden Park on 6th June and then for the trip to Vaduz to take on Liechtenstein on 9th June.
Angus Gunn makes a return to the squad with Craig Gordon and Liam Kelly both ruled out through injury.
Gunn - who missed out last time due to his own injury issues - is currently searching for a new club after his contract expired at Norwich.
There will now be five representatives from Italian leagues in Clarke's squad as uncapped full back Josh Doig (Sassuolo) is in line to make his debut.
Scott McTominay and Billy Gilmour may join the group as Scudetto winners with Napoli putting themselves on the verge of winning the Serie A title on Sunday night.
Whilst their silverware is not yet confirmed, there will be a Coppa Italia winner amongst the ranks.
Lewis Ferguson gets the chance to add to his 14 caps after he became the first Scotsman to lift the trophy since Graeme Souness in 1985.
Torino forward Che Adams also retains his place in the 25-man list.
Hibernian's Kieron Bowie has impressed this season and has earned his first call-up as a result.
"Kieron is one I've always had my eye on from the under-21s. Anytime I watched them, he always stood out. Physical, strong and has good attributes to his game," said Clarke.
"Going into the summer, you have people like Lawrence Shankland and Kevin Nisbet, I know what they can bring to this squad. It was just to have a look at something a little bit different and see if we can expand the pool of players."
Goalkeepers: Angus Gunn (Norwich), Robby McCrorie (Kilmarnock), Cieran Slicker (Ipswich).
Defenders: Josh Doig (Sassuolo), Grant Hanley (Birmingham), Jack Hendry (Al Etiffaq), Max Johnston (Sturm Graz), Scott McKenna (Las Palmas), Nathan Patterson (Everton), Anthony Ralston (Celtic), Andy Robertson (Liverpool), John Souttar (Rangers), Kieran Tierney (Arsenal).
Midfielders: Connor Barron (Rangers), Lewis Ferguson (Bologna), Billy Gilmour (Napoli), Andy Irving (West Ham), John McGinn (Aston Villa), Scott McTominay (Napoli), Lennon Miller (Motherwell).
Forwards: Che Adams (Torino), Kieron Bowie (Hibernian), Tommy Conway (Middlesbrough), George Hirst (Ipswich), James Wilson (Hearts).