Pelan, assisted by Fabian Turnes, was appointed last month to replace Marcelo Loffreda who left to take the helm at Leicester Tigers.
The first game is scheduled to take place on June 7 in Rosario but a venue has yet to be confirmed. Local reports suggest the Gigante de Arroyito stadium, where football team Rosario Central play, is a probable choice.
The second fixture will be a week later in Buenos Aires' Jose Amalfitani stadium, home of Velez Sarsfield football team.
The Pumas will play a third game against Italy in Cordoba on June 28.