diff --git a/src/testdir/test_lambda.vim b/src/testdir/test_lambda.vim
index aa73462..60d58c5 100644
--- a/src/testdir/test_lambda.vim
+++ b/src/testdir/test_lambda.vim
@@ -247,6 +247,11 @@
   call assert_equal(2, l:F())
   call assert_equal(3, l:F())
   call assert_equal(4, l:F())
+
+  call assert_match("^\n   function <SNR>\\d\\+_bar() closure"
+  \              .. "\n1        let x += 1"
+  \              .. "\n2        return x"
+  \              .. "\n   endfunction$", execute('func s:bar'))
 endfunc
 
 func Test_closure_unlet()