Town suffered a shock 3-0 defeat by lowly Hereford last weekend but their fate is still in their own hands as a victory at Accrington will guarantee third place.
"Good players respond to setbacks and this group of players have done that this season when they have had a below-par performance," said Brewster.
"Hereford is behind us now, we have moved on. We had a very positive chat with the boys and training this week has been excellent.
"We know what we have to do on Saturday. It is in our own hands. We deserve to be where we are and it's up to us now to make sure we are still there on Saturday."