diff --git a/src/nvim/testdir/test_autocmd.vim b/src/nvim/testdir/test_autocmd.vim
index e8e563d8ad..c4110eba94 100644
--- a/src/nvim/testdir/test_autocmd.vim
+++ b/src/nvim/testdir/test_autocmd.vim
@@ -314,6 +314,8 @@ func Test_three_windows()
   call assert_equal('Xanother', expand('%'))
 
   only
+
+  helptags ALL
   help
   wincmd w
   1quit