phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>
<phpunit colors="true"
         convertErrorsToExceptions="true"
         convertNoticesToExceptions="true"
         convertWarningsToExceptions="true"
         stopOnFailure="true"
        >
    <php>
        <ini name="display_errors" value="on"/>
    </php>

    <testsuites>
        <testsuite name="Main Tests Suite">
            <directory>tests</directory>
        </testsuite>
    </testsuites>
    <filter>
        <whitelist processUncoveredFilesFromWhitelist="false">
            <file>./backup.php</file>
            <directory>./src</directory>
        </whitelist>
    </filter>
</phpunit>