diff --git a/src/testdir/test_popup.vim b/src/testdir/test_popup.vim
index d037b7a..cc93ff8 100644
--- a/src/testdir/test_popup.vim
+++ b/src/testdir/test_popup.vim
@@ -427,6 +427,11 @@
   call feedkeys("u", 'xt')
   call assert_equal('bbb', getline(2))
 
+  call feedkeys("A\<Right>\<C-N>\<Esc>", 'xt')
+  call assert_equal('January', getline(2))
+  call feedkeys("u", 'xt')
+  call assert_equal('bbb', getline(2))
+
   iunmap <Right>
   set completeopt&
   q!