diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index b7d2902..33ce700 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -1808,13 +1808,23 @@
   call s:setup_commands(a:cchar)
 
   call g:Xsetlist([{'bufnr': a:bnum, 'lnum': 1},
-	      \  {'bufnr': a:bnum, 'lnum': 2, 'end_lnum': 3, 'col': 4, 'end_col': 5}])
+        \  {'bufnr': a:bnum, 'lnum': 2, 'end_lnum': 3, 'col': 4, 'end_col': 5, 'user_data': {'6': [7, 8]}}])
   let l = g:Xgetlist()
   call assert_equal(2, len(l))
   call assert_equal(2, l[1].lnum)
   call assert_equal(3, l[1].end_lnum)
   call assert_equal(4, l[1].col)
   call assert_equal(5, l[1].end_col)
+  call assert_equal({'6': [7, 8]}, l[1].user_data)
+
+  " Test that user_data is garbage collected
+  call g:Xsetlist([{'user_data': ['high', 5]},
+        \  {'user_data': {'this': [7, 'eight'], 'is': ['a', 'dictionary']}}])
+  call test_garbagecollect_now()
+  let l = g:Xgetlist()
+  call assert_equal(2, len(l))
+  call assert_equal(['high', 5], l[0].user_data)
+  call assert_equal({'this': [7, 'eight'], 'is': ['a', 'dictionary']}, l[1].user_data)
 
   Xnext
   call g:Xsetlist([{'bufnr': a:bnum, 'lnum': 3}], 'a')