diff --git a/modoboa/calendars/tests.py b/modoboa/calendars/tests.py
index 1b817e747..f92ec4e04 100644
--- a/modoboa/calendars/tests.py
+++ b/modoboa/calendars/tests.py
@@ -103,7 +103,7 @@ class AccessRuleTestCase(ModoTestCase):
         self.assertEqual(
             cfg.get(section, "collection"), "admin@test.com/User calendar 0"
         )
-        self.assertEqual(cfg.get(section, "permissions"), "r")
+        self.assertEqual(cfg.get(section, "permissions"), "Rr")
 
         # Call a second time
         management.call_command("generate_rights", verbosity=False)