psalm.xml

<?xml version="1.0"?>
<psalm xmlns="https://getpsalm.org/schema/config"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
       errorLevel="8"
>
    <projectFiles>
        <directory name="src"/>
        <directory name="tests"/>
        <ignoreFiles>
            <directory name="vendor"/>
        </ignoreFiles>
    </projectFiles>
</psalm>