diff --git a/modoboa/core/tests/test_views.py b/modoboa/core/tests/test_views.py
index 4f304d1b8..46f333830 100644
--- a/modoboa/core/tests/test_views.py
+++ b/modoboa/core/tests/test_views.py
@@ -115,6 +115,7 @@ class SettingsTestCase(ModoTestCase):
         "admin-auto_create_domain_and_mailbox": "True",
         "admin-enable_dnsbl_checks": "True",
         "admin-default_domain_quota": "0",
+        "admin-default_mailbox_quota": "0",
         "core-ldap_server_address": "localhost",
         "core-authentication_type": "local",
         "core-ldap_admin_groups": "",