diff --git a/test/old/testdir/test_search.vim b/test/old/testdir/test_search.vim
index cd36f56f17..53c243c9d5 100644
--- a/test/old/testdir/test_search.vim
+++ b/test/old/testdir/test_search.vim
@@ -794,6 +794,7 @@ func Test_search_cmdline_incsearch_highlight()
 
   " clean up
   set noincsearch nohlsearch
+  call test_override("char_avail", 0)
   bw!
 endfunc