S3 Tests fail to run on ceph cluster

[Squid1990]

I tried to run this set of tests against a reef (and a quincy) ceph cluster and recieved the below error:

S3TEST_CONF=s3tests.conf tox -- s3tests_boto3/functional/test_s3.py::test_bucket_list_empty
.pkg: _optional_hooks> python /usr/lib/python3/dist-packages/pyproject_api/_backend.py True setuptools.build_meta __legacy__                                     
.pkg: get_requires_for_build_sdist> python /usr/lib/python3/dist-packages/pyproject_api/_backend.py True setuptools.build_meta __legacy__ 

-- SNIP --

        if http.status_code >= 300:
            error_code = parsed_response.get("Error", {}).get("Code")
            error_class = self.exceptions.from_code(error_code)
>           raise error_class(parsed_response, operation_name)
E           botocore.exceptions.ClientError: An error occurred (SignatureDoesNotMatch) when calling the ListBuckets operation: None

.tox/py/lib/python3.12/site-packages/botocore/client.py:938: ClientError
--------------------------------------------------------------------- Captured stdout setup ---------------------------------------------------------------------
Done with cleanup of buckets in tests.
Done with cleanup of buckets in tests.

I have verified the credentials supplied to the test suite with both s3cmd and by using boto in a python shell, and both of these work. I anticipated that perhaps I was running into boto/boto3#4400 and so I disabled the checksums by setting env vars in tox.ini however the issue was not resolved. I tried both the ceph-reef and master branches of this project with the same result. This looks like a bug but perhaps I set something up incorrectly.