Spinner Jon Holland and potential debutant Jhye Richardson have been included in Australia's 15-man squad for the upcoming tour of South Africa.
Selectors retained the side that sealed a 4-0 Ashes win over England in Sydney earlier this month, while adding Holland and Richardson to the touring party for the four-Test series, starting in Durban on March 1.
Victorian left-armer Holland only has two Test appearances to his name, having not played since August 2016 and he is expected to provide backup for leading spinner Nathan Lyon.
The 30-year-old has taken 11 wickets in two Sheffield Shield matches this season, having claimed 50 last term.
"Jon was the second leading wicket-taker in the Sheffield Shield last season and has performed well in the games he has played for Victoria this season," national selector Trevor Hohns said.
"We envisage the wickets we will see in South Africa will not warrant the need to play two spinners. Therefore, should Nathan not be able to play at any stage, we wanted to have the best specialist spinner available to us and based on current red-ball form Jon warrants that spot."
Uncapped paceman Richardson will travel to South Africa along with Mitchell Starc, Josh Hazlewood and Pat Cummins.
The 21-year-old made his one-day international debut against England at the Gabba last week, finishing with figures of 2-57.
"Jhye is a talented right-armer that bowls with very good pace through the air. He impressed in his first one-day international and has bowled well in the Sheffield Shield this season. He is an exciting young prospect who will benefit immensely from his time with this squad," Hohns added.
Meanwhile, David Warner will captain Australia in their Twenty20 international tri-series against New Zealand and England, starting at the SCG on February 3.
Warner will remain in Australia while his Test team-mates fly out to South Africa on February 15, with regular skipper Steve Smith rested for the T20 series.
Hobart Hurricanes star D'Arcy Short is set to make his T20 bow, while big-hitting batsman Glenn Maxwell – overlooked for the Tests and ODIs against England – is in the squad.
"Steve has had a very big summer and will benefit from a short break both physically and mentally, before he leaves for South Africa," Hohns said.
"David is a very capable leader and has captained in Steve's absence before and done a fine job. We wanted to ensure the T20 side had key leadership throughout this series and we know the team is in good hands with him at the helm."
Australia Test squad: Steve Smith (c), David Warner, Cameron Bancroft, Usman Khawaja, Peter Handscomb, Shaun Marsh, Mitchell Marsh, Tim Paine, Mitchell Starc, Josh Hazlewood, Pat Cummins, Nathan Lyon, Jackson Bird, Jon Holland, Jhye Richardson.
T20 squad: David Warner (c), Aaron Finch, Ashton Agar, Alex Carey, Ben Swarshuis, Travis Head, Chris Lynn, Glenn Maxwell, Kane Richardson, D'Arcy Short, Billy Stanlake, Marcus Stoinis, Andrew Tye, Adam Zampa.
|Young: Man United can win Champions League|
|Harper refuses to talk free agency, says he´s focused on this season|
|Messi is best but ´not invincible´, says Pedro|
|It´s a red card – Guardiola accepts Delph sending off amid City´s Wigan woe|
|Goffin hopeful of ´fast recovery´ after nasty eye injury|
|Aguero lashes out at fan as tempers flare after Wigan stun Man City|
|Grigg revels in dousing Manchester City´s fire|
|Dzumhur saves four match points to down Kukushkin|
|Wigan Athletic 1 Manchester City 0: Grigg ends Guardiola´s quadruple dream|
|Edinburgh to finish season at Murrayfield|
|Messi the best but don´t forget Suarez, says Chelsea boss Conte|
|I need a great game – Hazard aiming for Messi heights|
|AFC Champions League Review: El-Arabi´s brace seals Al Wahda´s fate|
|Dubai disappointment for Radwanska|
|Patriots knew Butler would be benched, says McCourty|
|Barcelona boss Valverde tells Chelsea: History counts|
|Schmidt departs as Wolfsburg face relegation fight|
|Madrid, Barca & PSG are Champions League favourites, says Heynckes|
|I was at rock bottom – Brook opens up on depression battle|
|Rashid in form as Afghanistan rout sorry Zimbabwe|
|Toulon president charged over Bastareaud comments|
|Biggar, Halfpenny and Faletau all fit as Wales given clean bill of health|
|Hughes availability ´absolutely huge´ for England, says Alphonsi|
|Former football coach Bennell sentenced to 31 years|
|Why didn´t Jimmy Butler play in NBA All-Star Game?|
|Returning Ringrose added to Ireland Six Nations squad|
|Hummels wary of ´top European team´ as Bayern prepare for Besiktas|
|In-form Kvitova withdraws from Dubai|
|WATCH: ´Crazy´ Evra drives to West Ham training in London cab|
|Barca clash a chance for Chelsea ´to do things right´, proclaims Rudiger|
|Lucas claims Tottenham can win Champions League|
|Federer the ´complete player´ with number-one return - Schuettler|
|LeBron relishes one more link-up with Irving|
|Barcelona tie will not decide Conte´s Chelsea future, says Deco|
|Cordner signs bumper deal with Roosters|
|Lewandowski won´t be distracted by Real Madrid rumours|
|Bennett signs on until 2019 with England|
|Man Utd must not underestimate Sevilla - Navas|
|Coleman demolishes 20-year-old 60m world record|
|Red Bull reveal ´special edition´ livery on 2018 car|
|Iniesta will not be made welcome at Stamford Bridge, warns Azpilicueta|
|Ballack sees ´a big difference´ between Bundesliga and Premier League|
|Karmichael Hunt faces no conviction, but will remain sidelined|
|Betis boss would have preferred to face Madrid´s BBC|
|Chelsea v Barcelona: Messi´s blues against the Blues|
|James leaving Madrid was the best thing, says father|
|He´s looking good – Zidane thrilled with Ronaldo|
|It needs to take 30 seconds – Matic wants quicker VAR|
|Team LeBron edges Team Stephen in thrilling All-Star Game|
|McIlroy sees progress despite failing to contend at Riviera|
|Silver supports NBA players speaking out on social issues|
|Mickelson ready for Masters after third straight top-six finish|
|Gattuso: My job is to be the players´ nightmare until season´s end|
|I wasn´t good enough – Guardiola reveals Wigan rejection|
|Dillon reigns supreme with overtime win at Daytona 500|
|Bubba Watson ends drought with third Genesis Open title|
|Brazilian derby between Vitoria and Bahia abandoned after red-card frenzy|
|Anderson ends barren spell with New York Open triumph|
|It was crazy, but I like that - Zidane revels in eight-goal Betis thriller|
|Asensio credits Zidane for Madrid´s thrilling Betis comeback|
|Zidane hopeful over Marcelo hamstring injury|
|Overton replaces injured Plunkett for Blacks Caps ODI series|
|Bonaventura claims Milan can catch Inter|
|Bravo for Claudio! Guardiola to pick keeper at Wembley|
|Mourinho hoping for reinforcements at Sevilla|
|´Quick-healer´ Groves hopeful over shoulder injury|
|Real Madrid become first side to score 6,000 goals in LaLiga|
|Real Betis 3 Real Madrid 5: Asensio at the double in LaLiga classic|
|AC Milan 1 Sampdoria 0: Bonaventura makes it 10 unbeaten for Rossoneri|
|Schurrle excited to finally link up with Reus and Gotze|