def METHOD_NAME(self):
    self.add_msg_response("m-p-c")
    self.resp.add(
        method=responses.POST,
        url="https://slack.com/api/chat.deleteScheduledMessage",
        status=200,
        content_type="application/json",
        body=json.dumps({"ok": True}),
    )
    self.run_valid_test("#my-private-channel", CHANNEL_PREFIX, "m-p-c", False)