diff --git a/swh/web/settings/development.py b/swh/web/settings/development.py
index d1f9563b..826038cd 100644
--- a/swh/web/settings/development.py
+++ b/swh/web/settings/development.py
@@ -1,19 +1,17 @@
 # Copyright (C) 2017-2018  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU Affero General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
-# flake8: noqa
-
 """
 Django development settings for swh-web.
 """
 
-import os
+from django.core.cache import cache
 
-from .common import *
+from .common import * # noqa
+from .common import MIDDLEWARE
 
 MIDDLEWARE += ['swh.web.common.middlewares.HtmlPrettifyMiddleware']
 
-from django.core.cache import cache
 cache.clear()
diff --git a/swh/web/settings/production.py b/swh/web/settings/production.py
index 000d7ffa..a98d2fd7 100644
--- a/swh/web/settings/production.py
+++ b/swh/web/settings/production.py
@@ -1,54 +1,53 @@
 # Copyright (C) 2017-2018  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU Affero General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
-# flake8: noqa
-
 """
 Django production settings for swh-web.
 """
 
-import os
-
-from .common import *
+from .common import * # noqa
+from .common import (
+    MIDDLEWARE, CACHES, ALLOWED_HOSTS, WEBPACK_LOADER
+)
 from .common import swh_web_config
 from .common import REST_FRAMEWORK
 
 # activate per-site caching
 if 'GZip' in MIDDLEWARE[0]:
     MIDDLEWARE.insert(1, 'django.middleware.cache.UpdateCacheMiddleware')
 else:
     MIDDLEWARE.insert(0, 'django.middleware.cache.UpdateCacheMiddleware')
 
 MIDDLEWARE += ['swh.web.common.middlewares.HtmlMinifyMiddleware',
-                'django.middleware.cache.FetchFromCacheMiddleware']
+               'django.middleware.cache.FetchFromCacheMiddleware']
 
 CACHES.update({
     'default': {
         'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
         'LOCATION': swh_web_config['throttling']['cache_uri'],
     }
 })
 
 # Setup support for proxy headers
 USE_X_FORWARDED_HOST = True
 SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
 
 # We're going through seven (or, in that case, 2) proxies thanks to Varnish
 REST_FRAMEWORK['NUM_PROXIES'] = 2
 
 ALLOWED_HOSTS += [
     'archive.softwareheritage.org',
     'base.softwareheritage.org',
     'archive.internal.softwareheritage.org',
 ]
 
 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
         'NAME': swh_web_config['production_db'],
     }
 }
 
 WEBPACK_LOADER['DEFAULT']['CACHE'] = True
diff --git a/swh/web/settings/tests.py b/swh/web/settings/tests.py
index 17f4062c..4a0e0cc3 100644
--- a/swh/web/settings/tests.py
+++ b/swh/web/settings/tests.py
@@ -1,79 +1,76 @@
 # Copyright (C) 2017-2018  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU Affero General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
-# flake8: noqa
-
 """
 Django tests settings for swh-web.
 """
 
-import os
-
 from swh.web.config import get_config
 
 scope1_limiter_rate = 3
 scope1_limiter_rate_post = 1
 scope2_limiter_rate = 5
 scope2_limiter_rate_post = 2
 scope3_limiter_rate = 1
 scope3_limiter_rate_post = 1
 
 swh_web_config = get_config()
 
 swh_web_config.update({
     'debug': False,
     'secret_key': 'test',
     'throttling': {
         'cache_uri': None,
         'scopes': {
             'swh_api': {
                 'limiter_rate': {
                     'default': '60/min'
                 },
                 'exempted_networks': ['127.0.0.0/8']
             },
             'swh_vault_cooking': {
                 'limiter_rate': {
                     'default': '120/h',
                     'GET': '60/m'
                 },
                 'exempted_networks': ['127.0.0.0/8']
             },
             'swh_save_origin': {
                 'limiter_rate': {
                     'default': '120/h',
                     'POST': '10/h'
                 },
                 'exempted_networks': ['127.0.0.0/8']
             },
             'scope1': {
                 'limiter_rate': {
                     'default': '%s/min' % scope1_limiter_rate,
                     'POST': '%s/min' % scope1_limiter_rate_post,
                 }
             },
             'scope2': {
                 'limiter_rate': {
                     'default': '%s/min' % scope2_limiter_rate,
                     'POST': '%s/min' % scope2_limiter_rate_post
                 }
             },
             'scope3': {
                 'limiter_rate': {
                     'default': '%s/min' % scope3_limiter_rate,
                     'POST': '%s/min' % scope3_limiter_rate_post
                 },
                 'exempted_networks': ['127.0.0.0/8']
             }
         }
     }
 })
 
-from .common import *
+from .common import * # noqa
+from .common import ALLOWED_HOSTS, LOGGING # noqa
 
 ALLOWED_HOSTS += ['testserver']
 
 # Silent DEBUG output when running unit tests
 LOGGING['handlers']['console']['level'] = 'INFO'