Debutant Manuel Montero scored a late winning try for Argentina on Saturday, which narrowly defeated France 23-20 at the Mario Kempes stadium.
France had the better possession, but mistakes handed Argentina a try in each half, while France could only manage one try.
France hasnt won a game in Argentina against Los Pumas since 1998, but will get a chance in the final game of its two-game tour on June 23 in Tucuman.
Both sides were using the game as a chance to experiment with their starting lineups, with each fielding two debutants from the start.
It was Montero who made the key play of the game. He chased down a kick forward in the 77th minute, took the ball under control and avoided two tackles to make it 21-20 to the home side.