diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index 6b2b748..ef2d3bd 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -616,6 +616,9 @@
         \        {idx, val -> val != ':'}),
         \ '')
   call assert_equal([], getcompletion('set hl+=8'..hl_display_modes, 'cmdline'))
+  " Test completion in middle of the line
+  call feedkeys(":set hl=8b i\<Left>\<Left>\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"set hl=8bi i", @:)
 
   "
   " Test flag lists