I've been using the following code to run all tests in all plugins and applications.

Create an file with this code like 'run-all-test.php' and execute it in command line 'php run-all-test.php'.

Take a look at SF_ROOT_DIR, set the correct path of your ROOT project.

<?php
define( 'SF_ROOT_DIR', dirname(__FILE__).'/../../../..' );
include( SF_ROOT_DIR.'/config/config.php' );
 
require_once($sf_symfony_lib_dir.'/config/sfConfig.class.php');
require_once($sf_symfony_lib_dir.'/vendor/lime/lime.php');
require_once($sf_symfony_lib_dir.'/vendor/pake/pakeFinder.class.php');
 
$h = new lime_harness(new lime_output_color());
$h->base_dir = SF_ROOT_DIR;
 
// unit tests app
$h->register_glob( SF_ROOT_DIR.'/test/unit/*Test.php' );
$h->register_glob( SF_ROOT_DIR.'/test/unit/*/*Test.php' );
// functional tests app
$h->register_glob( SF_ROOT_DIR.'/test/functional/*Test.php');
$h->register_glob( SF_ROOT_DIR.'/test/functional/*/*Test.php');
 
// unit tests plugin
$h->register_glob( SF_ROOT_DIR.'/plugins/*Plugin/test/unit/*Test.php' );
$h->register_glob( SF_ROOT_DIR.'/plugins/*Plugin/test/unit/*/*Test.php' );
// functional tests plugin
$h->register_glob( SF_ROOT_DIR.'/plugins/*Plugin/test/functional/*Test.php' );
$h->register_glob( SF_ROOT_DIR.'/plugins/*Plugin/test/functional/*/*Test.php' );
 
$h->run();