diff --git a/tests/test-revert-interactive.t b/tests/test-revert-interactive.t
--- a/tests/test-revert-interactive.t
+++ b/tests/test-revert-interactive.t
@@ -18,7 +18,7 @@ 10 run the same test than 8 from within 
   > EOF
 
 
-  $ mkdir -p a/{folder1,folder2}
+  $ mkdir -p a/folder1 a/folder2
   $ cd a
   $ hg init
   $ python $TESTDIR/seq.py 1 5 > f ; hg add f ; hg commit -m "adding f"