diff --git a/tests/test-merge-tools.t b/tests/test-merge-tools.t
index a19046744e4e987847f0faea74241ff5dc68533c_dGVzdHMvdGVzdC1tZXJnZS10b29scy50..195ad823b5d58c68903a6153a25e3fb4ed25239d_dGVzdHMvdGVzdC1tZXJnZS10b29scy50 100644
--- a/tests/test-merge-tools.t
+++ b/tests/test-merge-tools.t
@@ -774,4 +774,6 @@
   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)
 
@@ -777,5 +779,5 @@
 
-#if no-windows
+#if unix-permissions
   $ beforemerge
   [merge-tools]
   false.whatever=