app/config/testing/session.php
<?php
return array(
/*
|--------------------------------------------------------------------------
| Default Session Driver
|--------------------------------------------------------------------------
|
| This option controls the default session "driver" that will be used on
| requests. By default, we will use the lightweight native driver but
| you may specify any of the other wonderful drivers provided here.
|
| Supported: "native", "cookie", "database", "apc",
| "memcached", "redis", "array"
|
*/
'driver' => 'array',
);