File: phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         colors="true"
         bootstrap="vendor/autoload.php"
         failOnRisky="true"
         failOnWarning="true"
         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">

  <coverage>
    <include>
      <directory>src</directory>
    </include>
  </coverage>

  <php>
    <env name="LANG" value="en_US.UTF-8" force="true"/>
    <ini name="error_reporting" value="-1"/>
  </php>

  <testsuites>
    <testsuite name="default">
      <directory>./tests/</directory>
    </testsuite>
  </testsuites>

</phpunit>