Bernie's recall caps a fine season for the full-back - he played in every one of the Warriors games and was Glasgow's Players' Player of the Year.
Glasgow coach Sean Lineen rewarded Bernie with a new two-year contract.
The Pumas meet Scotland at Rosario's Estadio Gigante de Arroyito on June 7 before the sides meet again at Velez Sarsfield's Jose Amalfitani stadium in Buenos Aires one week later.
The Pumas follow up their two-Test series against Scotland with a clash against Italy in Cordoba on June 28.
Argentina squad to play Scotland on June 7
Forwards: S Gonzalez Bonorino (Capitolina), M Ayerza (Leicester), J Gomez (Leinster), J Stuart, P Gambarini (both CASI), A Costa Repetto (Los Matreros), A Tejeda (Overmach Parma), I Fernandez Lobbe (Northampton), E Lozada (Toulon), M Durand (Champagnat), JM Leguizamon (London Irish), A Campos (Pueyrredon), JM Fernandez Lobbe (Sale).
Backs: F Contepomi (Leinster), F Todeschini (Montpellier), G Tiesi (Harlequins), S Fernandez, H Senillosa (both Hindu), Bernardo Stortoni (Glasgow Warriors), N Vergallo (Jockey Club Rosario), N Bruzzone, A Lalanne (both SIC), JM Nunez Piossek (Huirapuca), T De Vedia (London Irish).