phpunit.xml.dist
<?xml version="1.0" encoding="UTF-8"?>
<phpunit colors="true" bootstrap="vendor/autoload.php">
<testsuites>
<testsuite name="Slack Client Testsuite">
<directory>test</directory>
</testsuite>
</testsuites>
<filter>
<whitelist>
<directory suffix=".php">./src</directory>
<exclude>
<directory>./vendor</directory>
<directory>./test</directory>
</exclude>
</whitelist>
</filter>
</phpunit>