def METHOD_NAME(self):
    self.request.data = {
        "token": options.get("slack.verification-token"),
        "challenge": "abc123",
        "type": "url_verification",
    }
    self.request.body = urlencode(self.request.data).encode("utf-8")
    self.request.META = set_signing_secret("bad_key", self.request.body)
    with pytest.raises(SlackRequestError) as e:
        self.slack_request.validate()
        assert e.status == 401