diff --git a/qubesadmin/tests/mock_app.py b/qubesadmin/tests/mock_app.py
index 6577563a..79a63c14 100644
--- a/qubesadmin/tests/mock_app.py
+++ b/qubesadmin/tests/mock_app.py
@@ -231,6 +231,7 @@ def default_string(self):
     "qubes-vm-update-update-if-stale",
     "restart-after-update",
     "qubes-vm-update-hide-skipped",
+    "qubes-vm-update-hide-prohibited",
     "template-name",
     "last-updates-check",
     "last-update",