diff --git a/faassupervisor/storage/providers/rucio.py b/faassupervisor/storage/providers/rucio.py
index d1322d7..c309153 100644
--- a/faassupervisor/storage/providers/rucio.py
+++ b/faassupervisor/storage/providers/rucio.py
@@ -25,6 +25,7 @@
     pass
 
 
+from rucio.common.config import config_set, config_add_section, config_has_section
 from rucio.client.client import Client
 from rucio.client.uploadclient import UploadClient
 from rucio.client.downloadclient import DownloadClient
@@ -63,14 +64,12 @@ def __init__(self, stg_auth):
             self.scopes = self._OIDC_SCOPE.split()
         self.token_temp_file = tempfile.mktemp(prefix='rucio_token_',
                                                suffix='.token')  # nosec
-        self._create_config_file()
+        self._create_rucio_config()
 
     def __del__(self):
         try:
             if os.path.exists(self.token_temp_file):
                 os.remove(self.token_temp_file)
-            if os.path.exists(self.cfg_temp_file):
-                os.remove(self.cfg_temp_file)
         except Exception as exc:
             get_logger().warning('Error removing temporary file: %s', exc)
 
@@ -88,22 +87,23 @@ def _get_access_token(self):
                                                              self.client_id)
         return self.oidc_token
 
-    def _create_config_file(self):
-        cfg_temp_file = tempfile.NamedTemporaryFile(delete=False)
-        cfg_temp_file.write(b'[client]\n')
-        cfg_temp_file.write(b'rucio_host = %s\n' % self.rucio_host.encode())
-        cfg_temp_file.write(b'auth_host = %s\n' % self.auth_host.encode())
-        cfg_temp_file.write(b'auth_type = oidc\n')
-        cfg_temp_file.write(b'account = %s\n' % self.scope.encode())
-        cfg_temp_file.write(b'auth_token_file_path = %s\n' % self.token_temp_file.encode())
-        cfg_temp_file.write(b'oidc_scope = %s\n' % self._OIDC_SCOPE.encode())
-        self.cfg_temp_file = cfg_temp_file.name
+    def _create_rucio_config(self):
+        os.environ["RUCIO_CLIENT_MODE"] = "1"
+        os.environ["RUCIO_CONFIG"] = "/dev/null"
+
+        if not config_has_section("client"):
+            config_add_section("client")
+        config_set(section="client", option="auth_token_file_path", value=self.token_temp_file)
+        config_set(section="client", option="oidc_scope", value=self._OIDC_SCOPE)
+        config_set(section="client", option="rucio_host", value=self.rucio_host)
+        config_set(section="client", option="auth_host", value=self.auth_host)
+        config_set(section="client", option="account", value=self.scope)
+        config_set(section="client", option="auth_type", value="oidc")
 
     def _get_rucio_client(self, client_type=None):
         # Create token file
         with open(self.token_temp_file, 'w') as f:
             f.write(self._get_access_token())
-        os.environ['RUCIO_CONFIG'] = self.cfg_temp_file
         client = Client()
         if not client_type:
             return client
@@ -134,7 +134,7 @@ def download_file(self, parsed_event, input_dir_path):
                 complete_name = file["dest_file_paths"][0]
                 basename = os.path.basename(complete_name)
                 FileUtils.cp_file(complete_name, SysUtils.join_paths(input_dir_path,
-                                                            basename))
+                                                                     basename))
         except Exception as e:
             print("An exception occurred" + e)
         return input_dir_path
diff --git a/test/unit/faassupervisor/storage.py b/test/unit/faassupervisor/storage.py
index f117d94..83d169a 100644
--- a/test/unit/faassupervisor/storage.py
+++ b/test/unit/faassupervisor/storage.py
@@ -31,6 +31,7 @@
 from faassupervisor.events.onedata import OnedataEvent
 from faassupervisor.utils import StrUtils
 from rucio.common.exception import DataIdentifierNotFound
+from rucio.common.config import config_get, config_has_section
 
 
 # pylint: disable=missing-docstring
@@ -566,13 +567,16 @@ def test_download_file(self, mock_cp, mock_refesh, mock_download, mock_client):
         mock_download_client.download_dids.assert_called_once_with([{'did': 'test_account2:file1'},
                                                                     {'did': 'test_account2:file2'}])
         mock_rucio_client.list_files.assert_called_once_with('test_account2', 'dataset_name')
-        with open(rucio_provider.cfg_temp_file, 'r') as f:
-            content = f.read()
-            exp_content = RUCIO_CFG_FILE.format(rucio_provider=rucio_provider)
-            self.assertEqual(content, exp_content)
         with open(rucio_provider.token_temp_file, 'r') as f:
             content = f.read()
             self.assertEqual(content, 'new_access_token')
+        self.assertTrue(config_has_section('client'))
+        self.assertEqual(config_get('client', 'auth_token_file_path'), rucio_provider.token_temp_file)
+        self.assertEqual(config_get('client', 'oidc_scope'), Rucio._OIDC_SCOPE)
+        self.assertEqual(config_get('client', 'rucio_host'), rucio_provider.rucio_host)
+        self.assertEqual(config_get('client', 'auth_host'), rucio_provider.auth_host)
+        self.assertEqual(config_get('client', 'account'), rucio_provider.scope)
+        self.assertEqual(config_get('client', 'auth_type'), 'oidc')
 
     @mock.patch('faassupervisor.storage.providers.rucio.UploadClient')
     @mock.patch('faassupervisor.storage.providers.rucio.Client')