diff --git a/src/nvim/testdir/test_options.vim b/src/nvim/testdir/test_options.vim
index 72c151142d..41c689849b 100644
--- a/src/nvim/testdir/test_options.vim
+++ b/src/nvim/testdir/test_options.vim
@@ -209,7 +209,7 @@ func Test_set_completion()
 
   " Expand abbreviation of options.
   call feedkeys(":set ts\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set tabstop thesaurus', @:)
+  call assert_equal('"set tabstop thesaurus thesaurusfunc', @:)
 
   " Expand current value
   call feedkeys(":set fileencodings=\<C-A>\<C-B>\"\<CR>", 'tx')