File: phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
          bootstrap="vendor/autoload.php"
          colors="true"
          cacheDirectory=".phpunit.cache"
          executionOrder="depends,defects">
    <testsuites>
        <testsuite name="Unit">
            <directory>tests/Unit</directory>
        </testsuite>
    </testsuites>

    <source>
        <include>
            <directory>src</directory>
        </include>
    </source>

    <php>
        <ini name="display_errors" value="1"/>
        <ini name="error_reporting" value="-1"/>
        <server name="APP_ENV" value="testing"/>
        <server name="APP_DEBUG" value="1"/>
        <server name="APP_URL" value="http://localhost:8080"/>
    </php>
</phpunit>