Livingston 0-2 Morton
Archibald Campbell and Kyle Wilkie were on target as Morton beat Livingston.
But Morton face another season in the First Division after Partick sealed the title with a 2-0 win over Falkirk.
The hosts started brightly and had a number of chances to take an early lead but none of their efforts from range troubled Morton stopper David Hutton.
The tables turned in the closing stages of the first half and the visitors began to push for the opening goal.
Wilkie hit the post from 30 yards out before they finally broke the deadlock moments later.
Campbell latched onto Colin McMenamin's pass before tapping the ball past Darren Jamieson from close range.
Wilkie made it 2-0 10 minutes after the restart when he slotted the ball into the bottom corner six yards out.
Livingston: Jamieson, Watson, Barr, Garcia Tena, Donaldson (Mullen 46), Fox, O'Brien, Andreu ,Booth (Talbot 80), Iain Russell, Lander (Downie 58).Subs Not Used: McNeil, Beaumont.
Booked: Garcia Tena.
Morton: Hutton, Rutkiewicz, Mark McLaughlin, Reid, Taggart, Wilkie (O'Brien 89), Hardie (Bachirou 77), Halsman, Wallace, McMenamin, Campbell (MacDonald 70).Subs Not Used: Gaston, Dyer.
Goals: Campbell 43, Wilkie 55.
Ref: Craig Charleston