Elgg Unit Tests Page Not Found

Hello,

Happy 2018 to you all...
I actually have 2 issues right now!, and I require some help...
===>1.
I want to include/add a line of code into 'page/elements/comments_block' and I want some help...
$title = elgg_extract('title', $vars);
The above line of code must be included/added by a hook or any related method...
===>2.
I am getting 'Page Not Found' error when doing unit tests...
http://mydomain.xyz/engine/tests/suite.php

Regards,
Praveen Thomas