The 2010 mid-year rugby union tests (also known as the Summer Internationals in the Northern Hemisphere) refers to the rugby union Internationals that were played from late May to late June, mostly in the Southern Hemisphere. For Australia, New Zealand and South Africa, the Tests constituted preparation for the 2010 Tri Nations. The first nation to announce its fixtures for this series was Australia, which unveiled its schedule on 21 September 2009.