Argentina beat Italy 24-6 in Mendoza on Saturday in their final home test before the World Cup.
Argentine full-back Federico Serra scored 19 points as they took their third test win in a row following a 2-0 series victory over Ireland.
Serra scored the home side's second try, which he converted, and kicked four penalties, after wing Francisco Leonelli had run in the opening try just before the half hour and the Pumas led 18-3 at the interval.
Argentina centre Martin Gaitan received the ball from a ruck, evaded two tackles and passed out to Leonelli who ran over unopposed for their first try and Serra's try was similar.
Italy fullback David Bortolussi converted two penalties. Their flanker Josh Sole was sin-binned five minutes into the second half and prop Andrea Lo Cicero near the end, allowing Serra his two second-half penalty successes.
Italy are in Pool C of the World Cup with New Zealand, Scotland, Romania and Portugal.