Tom Bayliss and Liam Lindsay scored North End's goals in the 2-1 win, their fourth victory on the bounce.
They had fallen behind in the first half to a superb shot from James Garner but showed their character to fight back to get the three points.
Victory saw PNE finish 13th place in the table with 61 points, sending them on their holidays in a positive frame of mind.
Here are the Preston player ratings from the clash with Chris Hughton's men.
13. Tom Barkhuizen 6
Replaced Tom Bayliss in the 70th minute, bringing fresh legs - and fresh arms for his throw-ins. Photo: Camerasport
14. Brad Potts 5
Joined the action in the 82nd, taking over from Scott Sinclair. Lost the ball near the end after trying to play out of trouble, allowing Forest an attack. Photo: Camerasport
15. Sean Maguire 6
An 89th minute sub for Ched Evans as North End ran the clock down. Photo: Camerasport