From the news post:
BETA SCHEDULE
June 13-16 – MODE: Domination 2v2, MAP: Ricochet
June 17-20 – MODE: Deathmatch 2v2, MAP: Veteran
Beta ends on June 20 at 11:59pm PT
Nice. Good to see I wont have to contend with Domination for that long, it is Yoink