Duhan van der Merwe and Rory Sutherland both start this Saturday’s series decider against Argentina in Santiago del Estero (kick-off 8.10pm BST).
Van der Merwe continues on the wing, while Sutherland returns to the front-row having missed last week’s second test.
Scotland levelled the series last weekend with a comprehensive 29-6 victory thanks to a dominant second half display.
“It was great to have that win and the winning feeling that comes with it,” said Scotland Head Coach Gregor Townsend.
“We know we’ve got areas where we can improve such as the errors that we made early on in the game, and this week is about an 80 minute performance.”
Scotland | 15 Ollie Smith, 14 Rufus McLean, 13 Mark Bennett 12 Sione Tuipulotu, 11 Duhan van der Merwe, 10 Blair Kinghorn, 9 Ali Price, 1 Rory Sutherland, 2. Ewan Ashman, 3 Zander Fagerson, 4 Scott Cummings, 5 Jonny Gray, 6 Rory Darge, 7 Hamish Watson, 8 Matt Fagerson
Replacements | 16 Dave Cherry, 17 Pierre Schoeman, 18 Javan Sebastian, 19 Glen Young, 20 Andy Christie, 21 George Horne, 22 Ross Thompson, 23 Sam Johnson