diff --git a/tests/test-inherit-mode.t b/tests/test-inherit-mode.t
index 939f043ab5ed375f479b7d1324a9891058e262d9_dGVzdHMvdGVzdC1pbmhlcml0LW1vZGUudA==..7cf8de5a82d8e2d38c8ec0b4a46edf93c990f82f_dGVzdHMvdGVzdC1pbmhlcml0LW1vZGUudA== 100644
--- a/tests/test-inherit-mode.t
+++ b/tests/test-inherit-mode.t
@@ -138,7 +138,7 @@
   $ hg init setgid
   $ cd setgid
   $ chmod g+rwx .hg/store
-  $ chmod g+s .hg/store 2> /dev/null
+  $ chmod g+s .hg/store 2> /dev/null || true
   $ mkdir dir
   $ touch dir/file
   $ hg ci -qAm 'add dir/file'