Gavin and Andrew Williams scored Yeovil's goals as they beat Oldham to continue their good run of form.
Midfielder Gavin cracked home a stunning effort from 25 yards to set the visitors on their way to a fifth win in six games.
Zander Diamond crashed in an equaliser from Filipe Morais's corner, but the Glovers were not to be denied.
Forward Andrew latched on to Jonathan Obika's pass, rounded goalkeeper Alex Cisak and slotted into the empty net.
VIEWS FROM THE DRESSING ROOM
Oldham Athletic manager Paul Dickov told BBC Radio Manchester:
"It seemed a similar story to the other night. We're on top, we're creating chances, but we switch off at the back and concede a goal.
"We're constantly talking to the boys about how when you're on top in games you need to switch on at the back.
"Yet again we're talking about not having that cutting edge, missing chances and then not getting the points.
"We do have to start being more ruthless in front of goal, and when we're not, we have to make sure we don't concede at the other end."