diff --git a/README.md b/README.md
index efcff27048a628c0ef3dc84ea5fc62f4ab944219..492f91698446d80d6fa12f8e0eaccf13e535a045 100644
--- a/README.md
+++ b/README.md
@@ -82,3 +82,27 @@ wpdesk_permanent_dismissible_wp_notice( 'Notice text goes here', 'notice-name' )
 // Is equivalent to
 $notice = new \WPDesk\Notice\PermanentDismissibleNotice( 'Notice text goes here', 'notice-name' );
 ```
+
+## Project documentation
+
+### AJAX handler
+
+To use permanent dismissible notices AJAX handler must be created and hooks initialized:
+
+```php
+wpdesk_init_wp_notice_ajax_handler();
+
+// Is equivalent to:
+( new \WPDesk\Notice\AjaxHandler() )->hooks();
+```
+
+### Displaying 
+
+To display permanent dismissible notice:
+
+```php
+wpdesk_permanent_dismissible_wp_notice( 'Notice text goes here', 'notice-name' );
+
+// Is equivalent to
+$notice = new \WPDesk\Notice\PermanentDismissibleNotice( 'Notice text goes here', 'notice-name' );
+```
diff --git a/tests/integration/TestAjaxHandler.php b/tests/integration/TestAjaxHandler.php
index f930d5c566eb79c8e01eddf68fe381b70631cc53..2f7ee0001fa3392851ca8d76d9c10f9b81cd3a35 100644
--- a/tests/integration/TestAjaxHandler.php
+++ b/tests/integration/TestAjaxHandler.php
@@ -44,6 +44,9 @@ class TestAjaxHandler extends WP_UnitTestCase
     {
         $ajaxHandler = new AjaxHandler(self::ASSETS_URL);
         $ajaxHandler->hooks();
+        global $current_screen;
+        $current_screen = new stdClass();
+        $current_screen->id = 'test';
         do_action('admin_enqueue_scripts');
         $registeredScripts = wp_scripts()->registered;