Valley's first Butlin Road pre-season action ended in defeat against Southern League Premier Division side Stourbridge in scorching conditions.
Rugby's new-look starting line-up including some new faces, some returning players and seven of last season's squad.
Striker David Kolodysnki started in attack while former Leamington goalkeeper Ben Newey was between the sticks while ex-Long Buckby midfielder Max Johnson also started the game.
Former Rugby Town Academy prospects Melu Mpande and Josh Thomas also started in the wingback positions while manager Carl Adams was without regulars James Hancocks, Lee Thomas, Keenah Rosser and Kurtis Revan as well as new midfielder Barry Fitzharris.
The visitors led at half time after a fairly even opening period thanks to a freak own goal with new Rugby goalkeeper Newey allowing a Liam Francis back-pass from 30 yards under his foot and into the net.
Substitute Miracle Okafor netted twice in a ten minute period for the Glassboys before Rugby netted a consolation late on when Justin Marsden broke through the centre of the pitch before laying the ball through for trialist Jordan Hayward who found the far corner with a low left-footed strike.
Line-up: Newey; O Recci, L Recci, Francis; J Thomas, Mpande, M Johnson, Parker, Evans; Kolodynski, D Johnson. Subs: Marsden, Hayward, Blake.