phpunit: Can't run non-first test class in test file

Q	A
PHPUnit version	8.5.2
PHP version	7.4.2
Installation Method	Composer

Summary

No tests executed when try to run non-first test class in a test file

Current behavior

“No tests executed!” result message

How to reproduce

Create file MyTest.php with several test classes like

<?php
use PHPUnit\Framework\TestCase;

class TestFirst extends TestCase
{

    public function testOne()
    {
        static::assertTrue(true);
    }

    public function testTwo()
    {
        static::assertTrue(true);
    }
}

class TestSecond extends TestCase
{
    public function testOne()
    {
        static::assertFalse(false);
    }
}

Run command from cli /usr/bin/php vendor/phpunit/phpunit/phpunit --no-configuration --filter TestSecond MyTests.php

Expected behavior

TestSecond test should be run