Yorkhill was not overly impressive as he stretched his 100 per cent record over fences to two in the 'Money Back On Fallers' At Coral.ie Novice Chase at Leopardstown.
The 1-5 favourite, trained by Willie Mullins, had to be kept up to his work by Ruby Walsh to hold Jett after all five horses were in contention two out.
Walsh took Yorkhill to the front after jumping the fourth fence and last season's Neptune Novices' Hurdle winner did enough to follow up his debut victory over fences at Fairyhouse last month.
He was a length and a quarter ahead of 25-1 shot Jett at the line.
Paddy Power cut Yorkhill to 6-5 favourite from 7-4 for the JLT Novices' Chase at Cheltenham.