home.php

<?php
class Home_Controller extends Layout_Controller {
    public function __construct() {
        parent::__construct();
    }

    public function index() {
        $this->template->content = new View('home/home');
        $this->template->title = 'Index';

        ob_start();
        $controller = new Home_Controller();
        $controller->test();
        $var = ob_get_clean();
    }

    public function test() {
        $this->template->content = new View('home/test');
        $this->template->title = 'Test';
    }
}

home.php

This shoulkd be visible.

test.php

This should not be visible.

Expected output: "This shoulkd be visible."
Received output: "This shoulkd be visible. This should not be visible." (provided there is no template, else there'll be more of course)