gcsfs test_GoogleCredentials_None failing on the main branch?

The gcsfs test test_GoogleCredentials_None appears to be failing on the main branch.

I tried testing it locally like this:

conda env create -f ci/environment-py38.yml
conda activate test_env
tox -e gcsfs

=================================== FAILURES ===================================
_________________________ test_GoogleCredentials_None __________________________

    @my_vcr.use_cassette(match=["all"])
    def test_GoogleCredentials_None():
>       credentials = GoogleCredentials(project=None, token=None, access="read_only")

gcsfs/gcsfs/tests/test_credentials.py:7: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
gcsfs/gcsfs/credentials.py:52: in __init__
    self.connect(method=token)
gcsfs/gcsfs/credentials.py:214: in connect
    self.connect(method=meth)
gcsfs/gcsfs/credentials.py:226: in connect
    self.__getattribute__("_connect_" + method)()
gcsfs/gcsfs/credentials.py:73: in _connect_google_default
    credentials, project = gauth.default(scopes=[self.scope])
../lib/python3.8/site-packages/google/auth/_default.py:454: in default
    credentials, project_id = checker()
../lib/python3.8/site-packages/google/auth/_default.py:450: in <lambda>
    lambda: _get_gce_credentials(request),
../lib/python3.8/site-packages/google/auth/_default.py:272: in _get_gce_credentials
    if _metadata.ping(request=request):
../lib/python3.8/site-packages/google/auth/compute_engine/_metadata.py:85: in ping
    response = request(
../lib/python3.8/site-packages/google/auth/transport/_http_client.py:107: in __call__
    response = connection.getresponse()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <vcr.patch.VCRHTTPConnection/home/genevieve/GitHub/filesystem_spec/.tox/gcsfs/tmp/gcsfs/gcsfs/tests/recordings/test_GoogleCredentials_None.yaml object at 0x7f088df95460>
_ = False, kwargs = {}

    def getresponse(self, _=False, **kwargs):
        """Retrieve the response"""
        # Check to see if the cassette has a response for this request. If so,
        # then return it
        if self.cassette.can_play_response_for(self._vcr_request):
            log.info("Playing response for {} from cassette".format(self._vcr_request))
            response = self.cassette.play_response(self._vcr_request)
            return VCRHTTPResponse(response)
        else:
            if self.cassette.write_protected and self.cassette.filter_request(self._vcr_request):
>               raise CannotOverwriteExistingCassetteException(
                    cassette=self.cassette, failed_request=self._vcr_request
                )
E               vcr.errors.CannotOverwriteExistingCassetteException: Can't overwrite existing cassette ('/home/genevieve/GitHub/filesystem_spec/.tox/gcsfs/tmp/gcsfs/gcsfs/tests/recordings/test_GoogleCredentials_None.yaml') in your current record mode ('none').
E               No match for the request (<Request (GET) http://169.254.169.254>) was found.
E               No similar requests, that have not been played, found.

../lib/python3.8/site-packages/vcr/stubs/__init__.py:231: CannotOverwriteExistingCassetteException
=========================== short test summary info ============================
FAILED gcsfs/gcsfs/tests/test_credentials.py::test_GoogleCredentials_None - v...
= 1 failed, 92 passed, 10 skipped, 1 deselected, 1 xfailed, 1 xpassed in 37.55s =
ERROR: InvocationError for command /home/genevieve/GitHub/filesystem_spec/.tox/gcsfs/bin/py.test -vv gcsfs/gcsfs -k 'not fuse' (exited with code 1)
___________________________________ summary ____________________________________
ERROR:   gcsfs: commands failed

Start with gcsfs/gcsfs/tests/test_credentials.py and gcsfs/gcsfs/credentials.py, then run tox -e gcsfs using the reported environment. Inspect the test_GoogleCredentials_None cassette and the credential connection path for the unmatched metadata request. Done means the test passes and the gcsfs test suite no longer reports this failure.