diff --git a/tests/conftest.py b/tests/conftest.py
index 6a895fe..e2aabbc 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -18,29 +18,36 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+"""Configuration and fixtures for tests files."""
+
 import pytest
+
 from httmock import urlmatch, HTTMock, response
 
 import django_webtest
 
 from django.core.cache import cache
 
+
 @pytest.fixture(autouse=True)
 def media(settings, tmpdir):
+    """Set the media root to a temp dir created."""
     settings.MEDIA_ROOT = str(tmpdir.mkdir('media'))
 
 
 @pytest.fixture
 def app(request):
+    """Return a Django WebTest application."""
     wtm = django_webtest.WebTestMixin()
-    wtm._patch_settings()
-    request.addfinalizer(wtm._unpatch_settings)
+    wtm._patch_settings() # pylint: disable=protected-access
+    request.addfinalizer(wtm._unpatch_settings) # pylint: disable=protected-access
     cache.clear()
     return django_webtest.DjangoTestApp()
 
 
 @pytest.fixture
 def endpoint_dummy_cache(monkeypatch):
+    """Monkey patch the Django cache to a 'dummy' one for all passerelle views."""
     from django.core.cache import caches
     import passerelle.views
     monkeypatch.setattr(
@@ -48,12 +55,14 @@ def endpoint_dummy_cache(monkeypatch):
 
 
 @urlmatch()
-def internal_server_error(url, request):
+def internal_server_error(url, request): # pylint: disable=unused-argument
+    """Return an HTTP 500 error."""
     return response(500, 'Internal server error')
 
 
 @pytest.fixture
 def mock_500():
+    """Mock an Internal Server Error."""
     with HTTMock(internal_server_error):
         yield None
 
@@ -65,8 +74,8 @@ def relax_openssl(tmpdir):
     import os
 
     openssl_cnf_path = tmpdir / 'openssl.cnf'
-    with openssl_cnf_path.open('w') as fd:
-        fd.write(u'''
+    with openssl_cnf_path.open('w') as file_pt:
+        file_pt.write(u'''
 [default_conf]
 ssl_conf = ssl_sect
 
@@ -84,4 +93,3 @@ CipherString = ALL''')
             del os.environ['OPENSSL_CONF']
         else:
             os.environ['OPENSSL_CONF'] = old_value
-
diff --git a/tests/settings.py b/tests/settings.py
index f9e5efc..157ecc7 100644
--- a/tests/settings.py
+++ b/tests/settings.py
@@ -18,13 +18,15 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+"""Settings for testing."""
+
 import os
 
 LANGUAGE_CODE = 'en-us'
 TIME_ZONE = 'UTC'
 
 # include app
-INSTALLED_APPS += (
+INSTALLED_APPS += ( # pylint: disable=undefined-variable
     'atreal_openads',
 )