Disagreements arise across many social situations, from families to teams to workplaces. This paper explores how children think about the strategies people use when they disagree with their groups. Specifically, we ask how egalitarian and hierarchical group dynamics influence whether children expect others to speak up about their disagreement, go along with disliked decisions, or leave their groups. We found that 6- to 8-year-olds hold a strong initial expectation that disagreers will speak up, despite believing that the kind of group they are in determines how effective it is to do so. These expectations were dynamic: when given evidence that speaking up did not work, children deferred to other strategies. These results suggest that children update their expectations based on both what has worked in the past and on group dynamics.