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