workaround.php

<?php

/**
 * @group example
 */
trait ExampleGroup
{
    // utility methods here I guess?
}

/**
 * @group anotherExample
 */
class TestCase extends \PHPUnit\Framework\TestCase
{
    // this doesn't work :(
    // use ExampleGroup;
}

class SomeTest extends TestCase
{
    use ExampleGroup;

    public function testStuff()
    {
        $this->assertTrue(true);
    }
}