Nick Greenwood made 46 not out as Jersey beat Singapore by six wickets in their final warm-up match ahead of the T20 World Cup Qualifier in the UAE.
Neil MacRae's side bowled out Singapore - ranked four places higher than them in the world standings - for 112 before chasing down their target in the final over.
Greenwood - who was born in Jersey but grew up in New Zealand - made his island debut in September's Inter Insular Trophy win over Guernsey.
Young quick Julius Sumerauer was the pick of the bowlers, finishing with 3-20 from his three overs, while Ben Stevens scored 23 at the Dubai International Stadium.
Jersey beat Kenya on Tuesday in their first warm-up in Abu Dhabi, having begun their tour with a three-game T20I series in Qatar.
They begin their bid to reach a first ever T20 World Cup on Saturday when they face Nigeria in their opening group game.