diff --git a/tests_multipublik/settings.py b/tests_multipublik/settings.py
index 3251c24..ce4c4de 100644
--- a/tests_multipublik/settings.py
+++ b/tests_multipublik/settings.py
@@ -8,7 +8,7 @@ LANGUAGE_CODE = 'en-us'
 
 PROJECT_NAME = 'multipublik'
 
-with patch.object(builtin, 'file', mock_open(read_data='xxx')):
+with patch.object(builtin, 'open', mock_open(read_data='xxx')):
     execfile(os.path.join(os.path.dirname(__file__), '../debian/debian_config_common.py'))
 
 BRANCH_NAME = os.environ.get("BRANCH_NAME", "").replace('/', '-')