self = <Response [400]>

    def raise_for_status(self):
        """Raises stored :class:`HTTPError`, if one occurred."""

        http_error_msg = ''
        if isinstance(self.reason, bytes):
            # We attempt to decode utf-8 first because some servers
            # choose to localize their reason strings. If the string
            # isn't utf-8, we fall back to iso-8859-1 for all other
            # encodings. (See PR #3538)
            try:
                reason = self.reason.decode('utf-8')
            except UnicodeDecodeError:
                reason = self.reason.decode('iso-8859-1')
        else:
            reason = self.reason

        if 400 <= self.status_code < 500:
            http_error_msg = u'%s Client Error: %s for url: %s' % (self.status_code, reason, self.url)

        elif 500 <= self.status_code < 600:
            http_error_msg = u'%s Server Error: %s for url: %s' % (self.status_code, reason, self.url)

        if http_error_msg:
>           raise HTTPError(http_error_msg, response=self)
E           requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: https://cdn.optimizely.com/public/12122523685/s/12236426447_production.json

../../../.local/share/virtualenvs/docs_validation-uieTOkAZ/lib/python3.7/site-packages/requests/models.py:940: HTTPError

During handling of the above exception, another exception occurred:

settings = {'accountId': 12122523685, 'audience_id_ab_test': 0, 'audience_id_feature_test': 0, 'custom_audience_attribute_ab_test': '', ...}

    def test_getting_datafile_via_cdn(settings):
        url = f'https://cdn.optimizely.com/public/{settings["accountId"]}/s' \
            f'/{settings["project_id"]}_production.json'

>       cdn_datafile = getrequest(url, build_headers(settings)).text

tests/fs_tests/test_setup.py:38:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

url = 'https://cdn.optimizely.com/public/12122523685/s/12236426447_production.json'
header = {'Authorization': 'Bearer 2:wPVNqmq8GGJahiU1KscsHalhl9CU30y8-WBMpPI4X4KiuNu7To9A', 'user-agent': 'application/json'}

    def getrequest(url, header):
        """
        Returns <requests> object.
        So it can be applied to any format in the client function (text, json,...).
        """
        import sys
        settings = load_settings()
        try:
            r = requests.get(url, headers=header)
            r.raise_for_status()
            return r
        except requests.exceptions.RequestException as e:
            print(e)
>           sys.exit(1)
E           SystemExit: 1

helper_functions/helpers.py:54: SystemExit
==================================================================== 1 failed, 22 deselected in 0.58 seconds =====================================================================