--- a/tests/test-merge1.t	Fri Sep 07 14:48:38 2018 -0700
+++ b/tests/test-merge1.t	Fri Sep 07 23:39:49 2018 -0400
@@ -30,7 +30,8 @@
 
   $ mkdir b && touch b/nonempty
   $ hg up
-  abort: Directory not empty: '$TESTTMP/t/b'
+  abort: Unlinking directory not permitted: '$TESTTMP/t/b' (windows !)
+  abort: Directory not empty: '$TESTTMP/t/b' (no-windows !)
   [255]
   $ hg ci
   abort: last update was interrupted