phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.0/phpunit.xsd"
         bootstrap="System/Core/init.php" 
         colors="true"
         cacheDirectory=".phpunit.cache">
    <testsuites>
        <testsuite name="App">
            <directory>tests/App</directory>
        </testsuite>
        <testsuite name="System">
            <directory>tests/System</directory>
        </testsuite>
        <testsuite name="Packages">
            <directory>tests/Packages</directory>
        </testsuite>
    </testsuites>
    <source>
        <include>
            <directory suffix=".php">App</directory>
            <directory suffix=".php">System</directory>
            <directory suffix=".php">packages</directory>
        </include>
    </source>
    <php>
        <env name="APP_ENV" value="testing"/>
    </php>
</phpunit>