phpunit.xml

<?xml version="1.0" encoding="utf-8" ?>

<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.8/phpunit.xsd"
         backupGlobals="false"
         colors="true"
         bootstrap="bootstrap.php">
    <php>
        <ini name="error_reporting" value="-1"/>
    </php>

    <testsuites>
        <testsuite name="all_tests">
            <directory>tests</directory>
        </testsuite>
        <testsuite name="only_fast_tests">
            <directory>tests</directory>
            <exclude>tests/SlowTests</exclude>
        </testsuite>
        <testsuite name="only_slow_tests">
            <directory>tests/SlowTests</directory>
        </testsuite>
    </testsuites>

    <filter>
        <whitelist>
            <directory>src</directory>
        </whitelist>
    </filter>
</phpunit>