Edinburgh winger Emiliano Boffelli crossed after the 80-minute mark to deny Scotland a tour series victory in Argentina. Scotland were 15 points ahead with half an hour left following try doubles from Duhan van der Merwe and Ewan Ashman but the hosts fought back to seal a 34-31 victory in front of 30,000 fans in Santiago del Estero.
The pulsating decider ended in dramatic fashion when Argentina worked the ball out wide for Boffelli – who finished with 17 points – to go over following some sustained late pressure.
The winger had squandered a good chance for an early try when he mishandled on the touchline but the Edinburgh man soon kicked a penalty to open the scoring.
Scotland had made eight changes following their second-Test victory with full-back Ollie Smith making his debut, and they finally came to life in the 13th minute.