A Massachusetts court has set Oct. 3 as the start date for the trial that pits Viacom CEO Philippe Dauman against the company’s controlling shareholder Sumner Redstone.

Dauman had pushed for an early October trial in a motion filed last week. Dauman has challenged his removal from the board of the trust that will oversee Redstone’s holdings after his death and from the board of Redstone’s National Amusements holding company.

The legal fight is a battle for control of Viacom and CBS Corp. Dauman and longtime Redstone attorney George Abrams, who was also removed as a trustee and National Amusements board member, maintain that Redstone is too infirm to make such decisions and has been unduly influenced by his daughter, Shari Redstone.

The case is playing out probate and family court in Canton, Mass. Another trial related to the shakeup at Viacom is set to begin the week of Oct. 31 in Delaware in the suit brought by Viacom board member Fred Salerno over National Amusements’ plan to replace him and four others on the Viacom board. The judge in the Delaware case is trying to coordinate the discovery with the proceeding in Massachusetts.

The Massachusetts trial is projected to run from Oct. 3-7, according to the order issued Tuesday.