During his final season at Mogliano, Swanepoel was also drafted into the Benetton Treviso squad during their Pro12 campaign. He made his Pro12 debut in their Round Thirteen match against Welsh side Scarlets and also marked the occasion with his first try eleven minutes from time in a 33–41 defeat. Swanepoel featured in two more matches during the season – against the Ospreys and Ulster – as his side finished in eleventh spot on the table.