Exclude from search

Hi,

I’ve created a new custom post type, and set the value of “exclude_from_search” to true. But when I search on my website, it still returns the custom post type results.

This is a part of the code:

$args = array(
   'labels' => $labels,
   'public' => true,
   'exlude_from_search' => true,
   'show_in_menu' => true,
   'supports' => array('title', 'editor', 'thumbnail')
);

register_post_type('testimonials', $args);

What am I doing wrong?
Thanks in advance!