diff --git a/tests/install/create-leading b/tests/install/create-leading
index f421a259a..8bcba57ae 100755
--- a/tests/install/create-leading
+++ b/tests/install/create-leading
@@ -33,6 +33,9 @@ fail=0
 cd $dir
 file=file
 echo foo > $file
+
+# Before 4.0q, this would mistakenly create $file, not `dest'
+# in no-dir1/no-dir2/.
 ginstall -D $file no-dir1/no-dir2/dest || fail=1
 test -d no-dir1/no-dir2 || fail=1
 test -r no-dir1/no-dir2/dest || fail=1