def METHOD_NAME(self):
    with override_options({"slack.signing-secret": None}):
        self.request.data = {
            "token": options.get("slack.verification-token"),
            "challenge": "abc123",
            "type": "url_verification",
        }
        self.request.body = json.dumps(self.request.data).encode("utf-8")
        self.slack_request.validate()