diff --git a/test/ModuleInterface/Inputs/make-unreadable.py b/test/ModuleInterface/Inputs/make-unreadable.py
index 6a90d3ae511af..c8af100827864 100644
--- a/test/ModuleInterface/Inputs/make-unreadable.py
+++ b/test/ModuleInterface/Inputs/make-unreadable.py
@@ -30,7 +30,7 @@
 
     for path in sys.argv[1:]:
         subprocess.call(['icacls', path, '/deny',
-                         '{}:(R)'.format(user_name)])
+                         '{}:(RD)'.format(user_name)])
 else:
     for path in sys.argv[1:]:
         subprocess.call(['chmod', 'a-r', path])