diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index 2ee91f1..a317d8f 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -641,4 +641,13 @@
   call assert_equal(1, caught_1059)
 endfunc
 
+def RefFunc(Ref: func(string): string): string
+  return Ref('more')
+enddef
+
+def Test_closure_simple()
+  let local = 'some '
+  assert_equal('some more', RefFunc({s -> local .. s}))
+enddef
+
 " vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker