Workers at Raven Software, the studio behind development of Call of Duty: Warzone, will walk out of work Monday after the Activision Blizzard-owned studio laid off 12 quality assurance contractors last week.

“The Raven QA team and other members of Raven’s staff will be walking out with a singular demand,” Raven Software workers said in a statement sent to press. “Every member of the QA team, including those terminated on Friday, must be offered full time positions.” The workers added that they’re demonstrating “with the continued success of the studio at the forefront of their mind[s].”

Activision acquired Raven Software in 1997, and the Wisconsin-based studio that works on Call of Duty games, like Call of Duty: Black Ops and Call of Duty: Infinite Warfare, alongside other Activision Blizzard studios. The QA team is largely focused on Call of Duty: Warzone, representatives said.