Raffaele De Vita's late strike gave Swindon a narrow victory over bottom-of-the-league Plymouth.
Jake Jervis had an early opportunity for the visitors but headed wide from Liam Ridehalgh's deep cross.
Plymouth's best chance came from Jamie Griffith's header, which was tipped over the bar by Wes Foderingham.
De Vita secured victory for Swindon with a neat finish from Matt Ritchie's cross, leaving Plymouth four points adrift at the bottom of League Two.
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Plymouth Argyle caretaker manager Carl Fletcher told BBC Radio Devon:
"Disappointed in the result but the performance was really good from the lads. They did everything we asked.
"That's probably the best performance of the season. I can't be more proud of them.
"In football sometimes you don't get what you deserve, and I don't think we deserved to lose today."
Swindon Town manager Paolo di Canio told BBC Wiltshire:
"I'm very happy. It was difficult today but once again the best team on the field tried to play football.
"The goal we scored they should show at Champions League level in the way we move the ball, the quality of the passing and the finish.
"It was a tough week for me [after his father passed away]."