phpunit.xml.dist
<?xml version="1.0"?>
<phpunit bootstrap="vendor/autoload.php" colors="true"
beStrictAboutTestsThatDoNotTestAnything="false">
<testsuites>
<testsuite>
<directory>tests/</directory>
</testsuite>
</testsuites>
<filter>
<whitelist>
<directory suffix=".php">src/</directory>
</whitelist>
</filter>
<php>
<ini name="assert.exception" value="1"/>
</php>
</phpunit>