Simon Cox scored Swindon's only goal of the game in the second half.
Swindon's starting team was: Brezovan, Amankwaah, Kanyuka, Aljofree, Oduro, McGovern, Allen, Timlin, McNamee, Paynter and Joyce.
Swindon's next friendly game is at home to FA Cup holders Portsmouth on Friday at the County Ground.
