Tranmere suffered late heartbreak in their bid to move clear of the League Two relegation places as Swindon snatched a 1-0 victory at Prenton Park thanks to a stoppage-time winner from substitute Junior Hoilett.
The result extends Rovers' winless run to nine matches, while the Robins are now three points outside the automatic promotion spots.
Early Exchanges at Prenton Park
Swindon threatened early, with Marko Marosi saving well from Will Wright inside five minutes, while Sol Solomon was denied by Connor Ripley at the other end.