diff --git a/src/testdir/test64.in b/src/testdir/test64.in
index 77949c5..29bf0b9 100644
--- a/src/testdir/test64.in
+++ b/src/testdir/test64.in
@@ -507,6 +507,8 @@
 :" Check a pattern with a line break and ^ and $
 :call add(tl, [2, 'a\n^b$\n^c', ['a', 'b', 'c'], ['XX']])
 :"
+:call add(tl, [2, '\(^.\+\n\)\1', [' dog', ' dog', 'asdf'], ['XXasdf']])
+:"
 :"""" Run the multi-line tests
 :"
 :$put ='multi-line tests'
diff --git a/src/testdir/test64.ok b/src/testdir/test64.ok
index 4bbc533..a1498ea 100644
--- a/src/testdir/test64.ok
+++ b/src/testdir/test64.ok
@@ -1031,6 +1031,9 @@
 OK 0 - a\n^b$\n^c
 OK 1 - a\n^b$\n^c
 OK 2 - a\n^b$\n^c
+OK 0 - \(^.\+\n\)\1
+OK 1 - \(^.\+\n\)\1
+OK 2 - \(^.\+\n\)\1
 
 <T="5">Ta 5</Title>
 <T="7">Ac 7</Title>