diff --git a/src/testdir/test64.ok b/src/testdir/test64.ok
index a1c3f56..401da40 100644
--- a/src/testdir/test64.ok
+++ b/src/testdir/test64.ok
@@ -983,6 +983,9 @@
 OK 0 - \(r\@<=\|\w\@<!\)\/
 OK 1 - \(r\@<=\|\w\@<!\)\/
 OK 2 - \(r\@<=\|\w\@<!\)\/
+OK 0 - ^[a-z]\+\ze \&\(asdf\)\@<!
+OK 1 - ^[a-z]\+\ze \&\(asdf\)\@<!
+OK 2 - ^[a-z]\+\ze \&\(asdf\)\@<!
 OK 0 - \(a*\)\@>a
 OK 1 - \(a*\)\@>a
 OK 2 - \(a*\)\@>a