Ireland Sevens coach Jon Skurr scored an injury-time try that, once converted, meant Connacht slipped to a 15-14 defeat against Rotherham at the Sportsground.
The hosts led 14-8 on 80 minutes but Skurr went over under the posts in the second minute of injury-time and replacement Jonny West added the conversion.
Michael Bradley's men led 14-0 at the break thanks to tries from Sean Cronin and Andrew Browne which were converted by Ian Keatley.
Youngsters Tiernan O'Halloran and Eoin Griffin did well early on before Ray Ofisa laid off superbly for hooker Cronin to burst through for the game's first score.
A lineout and well-worked maul led to lock Browne crossing the visitors' whitewash, with Keatley's second conversion giving Connacht a healthy lead.
The westerners introduced twelve replacements in the second half, giving game-time to as many players as possible ahead of next Friday's Magners League opener against the Ospreys.
Bouncing back, Rotherham closed the deficit up to 14-8 when centre Andrew Henderson grabbed a try after 51 minutes and fly-half Matt Farmer landed a penalty after 71 minutes.
New winger Brian Tuohy looked to have saved Connacht's bacon by racing back to halt an interception try for the visitors but Skurr, who has coached Tuohy in the Ireland Sevens set-up, claimed the decisive score.