Kilmarnock manager had taken the uncharacteristic step of publicly calling for his inclusion after his impressive delays since breaking into the Rugby Park first team.
He impressed again againd Hearts on Saturday and scored his first SPL goal.
There is a hint of irony in injury opening the international door fro Leven as a knee injury two and a half years ago threatened to ruin his career. Jefferoes offered him a six month deal in order to prove his fitness and now looks set to complete a perfect rehabilitation with a long-term contract and a Scotland cap.