phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>

<phpunit colors="true"
         stopOnFailure="true"
         syntaxCheck="true"
         bootstrap="vendor/autoload.php">
    <testsuites>
        <testsuite name="Unit tests">
            <directory>./test/unit</directory>
        </testsuite>
    </testsuites>
    <filter>
        <whitelist>
            <directory>./src</directory>
        </whitelist>
    </filter>
</phpunit>