def METHOD_NAME(self):
    expected_authorization_header = (
        'AWS4-HMAC-SHA256 Credential='
        'public_key/20150620/region/s3/aws4_request, '
        'SignedHeaders=host;X-Amz-Content-Sha256;X-Amz-Date, '
        'Signature=signed_request'
    )
    actual_authorization_header = _get_authorization(
        'public_key', _get_scope(dt, 'region', "s3"),
        'host;X-Amz-Content-Sha256;X-Amz-Date', 'signed_request')
    self.assertEqual(expected_authorization_header,
                     actual_authorization_header)