phpunit.xml.dist

<phpunit bootstrap="tests/bootstrap.php">
    <testsuite>
        <directory suffix="Test.php">tests</directory>
    </testsuite>
    <filter>
        <whitelist processUncoveredFilesFromWhitelist="true">
            <directory suffix=".php">src</directory>
        </whitelist>
    </filter>
</phpunit>