Austria forward Valentino Lazaro curled in a stoppage time winner to give them a 2-1 win away to Northern Ireland who finished their UEFA Nations League campaign without a point on Sunday.
Xaver Schlager put Austria ahead four minutes after halftime, his first goal for his country, but Corry Evans levelled for the already-relegated hosts eight minutes later in the League B Group three match.
The game was heading for a draw until Marko Arnautovic found Lazaro and, despite a poor first touch, the 22-year-old curled his shot into the top corner from just inside the area to claim his first international goal.
Austria, already certain to finish second in the three-team group, finished their campaign with seven points from four games, three behind B3 winners Bosnia & Herzegovina.