diff --git a/src/testdir/test_vim9_disassemble.vim b/src/testdir/test_vim9_disassemble.vim
index f25b04a..ca9b90e 100644
--- a/src/testdir/test_vim9_disassemble.vim
+++ b/src/testdir/test_vim9_disassemble.vim
@@ -567,17 +567,17 @@
   var res = execute('disass g:Append')
   assert_match('<lambda>\d\_s*' ..
         'local ..= arg\_s*' ..
-        '\d LOADOUTER $0\_s*' ..
+        '\d LOADOUTER level 1 $0\_s*' ..
         '\d LOAD arg\[-1\]\_s*' ..
         '\d CONCAT\_s*' ..
-        '\d STOREOUTER $0\_s*' ..
+        '\d STOREOUTER level 1 $0\_s*' ..
         '\d RETURN 0',
         res)
 
   res = execute('disass g:Get')
   assert_match('<lambda>\d\_s*' ..
         'return local\_s*' ..
-        '\d LOADOUTER $0\_s*' ..
+        '\d LOADOUTER level 1 $0\_s*' ..
         '\d RETURN',
         res)
 
diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index 3d4f4c9..efbf3d5 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -1812,6 +1812,16 @@
   assert_match('def <lambda>\d\+(_: any, ...): number\n1  return 0\n   enddef', body)
 enddef
 
+def DoFilterThis(a: string): list<string>
+  # closure nested inside another closure using argument
+  var Filter = (l) => filter(l, (_, v) => stridx(v, a) == 0)
+  return ['x', 'y', 'a', 'x2', 'c']->Filter()
+enddef
+
+def Test_nested_closure_using_argument()
+  assert_equal(['x', 'x2'], DoFilterThis('x'))
+enddef
+
 func Test_silent_echo()
   CheckScreendump