phpunit.xml
<?xml version="1.0" encoding="UTF-8"?>
<phpunit colors="true" bootstrap="vendor/autoload.php">
<testsuites>
<testsuite name="Unit">
<directory>tests/</directory>
</testsuite>
</testsuites>
<filter>
<whitelist>
<directory suffix=".php">src/</directory>
</whitelist>
</filter>
</phpunit>