File: vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/test.xml

<?xml version="1.0" ?>

<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">

    <parameters>
        <parameter key="test.client.class">Symfony\Bundle\FrameworkBundle\Client</parameter>
        <parameter key="test.client.parameters" type="collection"></parameter>
        <parameter key="test.client.history.class">Symfony\Component\BrowserKit\History</parameter>
        <parameter key="test.client.cookiejar.class">Symfony\Component\BrowserKit\CookieJar</parameter>
        <parameter key="test.session.listener.class">Symfony\Bundle\FrameworkBundle\EventListener\TestSessionListener</parameter>
    </parameters>

    <services>
        <service id="test.client" class="%test.client.class%" shared="false">
            <argument type="service" id="kernel" />
            <argument>%test.client.parameters%</argument>
            <argument type="service" id="test.client.history" />
            <argument type="service" id="test.client.cookiejar" />
        </service>

        <service id="test.client.history" class="%test.client.history.class%" shared="false" />

        <service id="test.client.cookiejar" class="%test.client.cookiejar.class%" shared="false" />

        <service id="test.session.listener" class="%test.session.listener.class%">
            <argument type="service" id="service_container" />
            <tag name="kernel.event_subscriber" />
        </service>
    </services>
</container>