def METHOD_NAME(
    self, factories, group_members_service, creator
):
    group = factories.Group(creator=creator)  # creator will be a member
    new_members = [factories.User(), factories.User()]
    group.members.append(new_members[0])
    group.members.append(new_members[1])
    group_members_service.update_members(group, [])
    assert not group.members  # including the creator