phpunit.xml.dist

<?xml version="1.0"?>
<phpunit colors="true" bootstrap="vendor/autoload.php">
    <testsuites>
        <testsuite name="AllTests">
            <directory>./tests</directory>
        </testsuite>
    </testsuites>
     <filter>
        <whitelist processUncoveredFilesFromWhitelist="true">
            <directory suffix=".php">./src</directory>
        </whitelist>
    </filter>
</phpunit>