In 2008, Nightingale was called up to play for the New Zealand Kiwis for the ANZAC day Test. He was named in the New Zealand Kiwi's 49 man training squad alongside fellow Dragon's Chase Stanley and Rangi Chase for the rugby league world cup 2008. For the 2010 Anzac Test, Nightingale was selected to play for New Zealand on the wing, scoring a try in their loss against Australia. Nightingale was chosen in the 2010 Four Nations Kiwi squad, scoring three tries in four games, including a 71st minute try in the final and combining several minutes later with Benji Marshall and Shaun Kenny-Dowall to set up a breathtaking 70 m match winning try. Nightingale's fine late season form saw him earning a place in Rugby League world's team of the year. For the 2013 Anzac Test, Nightingale was selected to play for New Zealand on the wing in their loss again Australia.