<?php

use PHPUnit\Framework\TestCase;

class TimeTest extends TestCase
{
    public function testInTime() : void
    {
        // testing duration of a script is not
        // a good test method since runtime can be
        // affected by other causes.
        PHP_Timer::start();
        sleep(1);
        $time = PHP_Timer::stop();
        
        $message = sprintf('execution time was %s',
            PHP_Timer::secondsToTimeString($time));
        
        $this->assertLessThan(0, $time, $message);
    }
}

Time: 00:00.004, Memory: 18.00 MB

There was 1 error:

1) TimeTest::testInTime
Class "PHP_Timer" not found

PhpunitExec.php:21

ERRORS!
Tests: 1, Assertions: 0, Errors: 1.

PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8