diff --git a/django_journal/actions.py b/django_journal/actions.py
index 35a88ed..bd4e594 100644
--- a/django_journal/actions.py
+++ b/django_journal/actions.py
@@ -49,4 +49,4 @@ def export_as_csv(modeladmin, request, queryset):
     return response
 
 
-export_as_csv.short_description = _("Export CSV file")
+export_as_csv.short_description = _('Export CSV file')
diff --git a/setup.py b/setup.py
index 17f1a5c..f1e8cd9 100755
--- a/setup.py
+++ b/setup.py
@@ -116,7 +116,7 @@ setup(
     url='http://dev.entrouvert.org/projects/django-journal/',
     download_url='http://repos.entrouvert.org/django-journal.git/',
     author="Entr'ouvert",
-    author_email="info@entrouvert.com",
+    author_email='info@entrouvert.com',
     packages=find_packages(os.path.dirname(__file__) or '.'),
     include_package_data=True,
     cmdclass={
diff --git a/test_settings.py b/test_settings.py
index b1ca36e..266d970 100644
--- a/test_settings.py
+++ b/test_settings.py
@@ -9,7 +9,7 @@ DATABASES = {
     'error': {'ENGINE': 'django.db.backends.postgresql_psycopg2', 'NAME': '_test'},
 }
 
-SECRET_KEY = "django_tests_secret_key"
+SECRET_KEY = 'django_tests_secret_key'
 PASSWORD_HASHERS = ('django.contrib.auth.hashers.MD5PasswordHasher',)
 ROOT_URLCONF = 'test_urls'