Guillem Bauza scored on his Exeter debut as they beat Yeovil in the Carling Cup first round.
The Spaniard came on a substitute and missed the target from distance before firing a shot against the post.
But after the break he got his goal, latching onto Nicholas Bignall's pass 12 yards out and slotting home.
Chris Shephard sealed the win three minutes into stoppage time when he converted Tom Nichols' cross from inside the area.
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Yeovil manager Terry Skiverton told BBC Somerset:
"I thought the performance was better but we need to make sure we are not so open - it's about getting that balance right.
"We've got to get in there. A few people are a bit tense and nervous and all we need is that final ball.
"What we can't afford to do is get too negative."