Who holds the record of the highest partnership between brothers in test cricket?

286 runs Upul Tharanga & Sanath Jayasuriya against Top England in Leeds. Check the top 10 list here<a class="url" target="_blank" rel="nofollow noreferrer" href="/to/?target=http://criclivescore.org/top-10-odi-opening-partnerships-international-cricket/">Partnership ODI records</a>