Uncapped wicketkeeper-batsman Heinrich Klaasen and all-rounder Wiaan Mulder were named in South Africa's 15-man Test squad yesterday for the first two of the four-match series against Australia.
Klaasen proved swashbuckling with the bat in both the ODI and T20I series against India over the last month and selector Linda Zondi said, "We firmly believe he can become just as good a player in the five-day format".
The 26-year-old has played four ODIs and two T20Is for South Africa.
"The selection of Mulder continues our strategy to expand our pool of all-rounders against top quality opposition," added Zondi in a Cricket South Africa statement.
"He is a batting all-rounder and his selection will depend on how we decide to balance our starting XI."
Mulder, 20, represented South Africa in an ODI against Bangladesh in October last year.
The duo take the places of Chris Morris and Andile Phehlukwayo in the squad that beat India 2-1 in their recent three-Test series.
The first Test against Australia is in Durban, starting Thursday with the second in Port Elizabeth from March 9-13.
Squad: Faf du Plessis (captain), Hashim Amla, Temba Bavuma, Quinton de Kock, Theunis de Bruyn, AB de Villiers, Dean Elgar, Heinrich Klaasen, Keshav Maharaj, Aiden Markram, Morne Morkel, Wiaan Mulder, Lungisani Ngidi, Vernon Philander and Kagiso Rabada