Speaking after the win, new boss Cotterill said he hopes that the three points will give the whole club a lift.
"I'm really, really pleased for everybody to be honest," Cotterill told Sky Sports News. "It has been a tough season for everybody connected with Nottingham Forest.
"Hopefully tonight that's given everybody a lift.
"Tonight I thank the players for their effort and we can enjoy our day tomorrow."
Next up for Cotterill's Forest is a trip to Blackpool on Saturday afternoon.