diff --git a/tests/test-merge-tools.t b/tests/test-merge-tools.t
--- a/tests/test-merge-tools.t
+++ b/tests/test-merge-tools.t
@@ -774,8 +774,10 @@ Merge using tool with a path that must b
   M f
 
 Issue3581: Merging a filename that needs to be quoted
+(This test doesn't work on Windows filesystems even on Linux, so check
+for Unix-like permission)
 
-#if no-windows
+#if unix-permissions
   $ beforemerge
   [merge-tools]
   false.whatever=