diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index 35b7d48..bd9da73 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -1570,7 +1570,7 @@
 
 " Test for changing options in a sandbox
 func Test_opt_sandbox()
-  for opt in ['backupdir', 'cdpath', 'exrc', 'findexpr']
+  for opt in ['backupdir', 'cdpath', 'exrc', 'findfunc']
     call assert_fails('sandbox set ' .. opt .. '?', 'E48:')
     call assert_fails('sandbox let &' .. opt .. ' = 1', 'E48:')
   endfor