def METHOD_NAME(
    mocker, user, other_user, private_thread
):
    notify_on_new_private_thread_mock = mocker.patch(
        "misago.threads.participants.notify_on_new_private_thread"
    )
    add_participants(user, private_thread, [user, other_user])
    notify_on_new_private_thread_mock.delay.assert_called_once_with(
        user.id, private_thread.id, [other_user.id]
    )