Speed up your phpunit code coverage output in Laravel.

TestCase.php

<?php

namespace Tests;

use Illuminate\Foundation\Testing\TestCase as BaseTestCase;

abstract class TestCase extends BaseTestCase
{
    use CreatesApplication;

    protected function setUp(): void
    {
        if (function_exists('xdebug_set_filter')) {
            \xdebug_set_filter(
                \XDEBUG_FILTER_CODE_COVERAGE,
                \XDEBUG_PATH_WHITELIST,
                [
                    './app/'
                ]
            );
        }
        parent::setUp();
    }
}