diff --git a/swh/deposit/config.py b/swh/deposit/config.py
index 40ba465f..eab7deea 100644
--- a/swh/deposit/config.py
+++ b/swh/deposit/config.py
@@ -1,106 +1,109 @@
 # Copyright (C) 2017-2018  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import os
 import logging
 
 from swh.core.config import SWHConfig
 from swh.scheduler import get_scheduler
 
 # IRIs (Internationalized Resource identifier) sword 2.0 specified
 EDIT_SE_IRI = 'edit_se_iri'
 EM_IRI = 'em_iri'
 CONT_FILE_IRI = 'cont_file_iri'
 SD_IRI = 'servicedocument'
 COL_IRI = 'upload'
 STATE_IRI = 'state_iri'
 PRIVATE_GET_RAW_CONTENT = 'private-download'
 PRIVATE_CHECK_DEPOSIT = 'check-deposit'
 PRIVATE_PUT_DEPOSIT = 'private-update'
 PRIVATE_GET_DEPOSIT_METADATA = 'private-read'
 PRIVATE_LIST_DEPOSITS = 'private-deposit-list'
 
 ARCHIVE_KEY = 'archive'
 METADATA_KEY = 'metadata'
 RAW_METADATA_KEY = 'raw-metadata'
 
 ARCHIVE_TYPE = 'archive'
 METADATA_TYPE = 'metadata'
 
+
 AUTHORIZED_PLATFORMS = ['development', 'production', 'testing']
 
 DEPOSIT_STATUS_REJECTED = 'rejected'
 DEPOSIT_STATUS_PARTIAL = 'partial'
 DEPOSIT_STATUS_DEPOSITED = 'deposited'
 DEPOSIT_STATUS_VERIFIED = 'verified'
 DEPOSIT_STATUS_LOAD_SUCCESS = 'done'
 DEPOSIT_STATUS_LOAD_FAILURE = 'failed'
 
 # Revision author for deposit
 SWH_PERSON = {
     'name': 'Software Heritage',
     'fullname': 'Software Heritage',
     'email': 'robot@softwareheritage.org'
 }
 
 
-def setup_django_for(platform, config_file=None):
+def setup_django_for(platform=None, config_file=None):
     """Setup function for command line tools (swh.deposit.create_user) to
        initialize the needed db access.
 
     Note:
         Do not import any django related module prior to this function
         call. Otherwise, this will raise an
         django.core.exceptions.ImproperlyConfigured error message.
 
     Args:
         platform (str): the platform the scheduling is running
         config_file (str): Extra configuration file (typically for the
                            production platform)
 
     Raises:
         ValueError in case of wrong platform inputs.
 
     """
-    if platform not in AUTHORIZED_PLATFORMS:
-        raise ValueError('Platform should be one of %s' % AUTHORIZED_PLATFORMS)
-
-    os.environ.setdefault('DJANGO_SETTINGS_MODULE',
-                          'swh.deposit.settings.%s' % platform)
+    if platform is not None:
+        if platform not in AUTHORIZED_PLATFORMS:
+            raise ValueError('Platform should be one of %s' %
+                             AUTHORIZED_PLATFORMS)
+        if 'DJANGO_SETTINGS_MODULE' not in os.environ:
+            os.environ['DJANGO_SETTINGS_MODULE'] = (
+                'swh.deposit.settings.%s' % platform)
 
     if config_file:
         os.environ.setdefault('SWH_CONFIG_FILENAME', config_file)
 
     import django
     django.setup()
 
 
 class SWHDefaultConfig(SWHConfig):
     """Mixin intended to enrich views with SWH configuration.
 
     """
     CONFIG_BASE_FILENAME = 'deposit/server'
 
     DEFAULT_CONFIG = {
         'max_upload_size': ('int', 209715200),
         'checks': ('bool', True),
         'scheduler': ('dict', {
             'cls': 'remote',
             'args': {
                 'url': 'http://localhost:5008/'
             }
         })
     }
 
     ADDITIONAL_CONFIG = {}
 
     def __init__(self, **config):
         super().__init__()
         self.config = self.parse_config_file(
             additional_configs=[self.ADDITIONAL_CONFIG])
         self.config.update(config)
         self.log = logging.getLogger('swh.deposit')
         if self.config['checks']:
             self.scheduler = get_scheduler(**self.config['scheduler'])