bootstrap.php

<?php

$additionalNamespaces = null;

$rootPath = realpath(dirname(__DIR__));
$testsPath = "$rootPath/tests";

if (is_readable($testsPath . '/TestConfiguration.php')) {
    require_once $testsPath . '/TestConfiguration.php';
} else {
    require_once $testsPath . '/TestConfiguration.php.dist';
}

$path = array(
    ZF2_PATH,
    get_include_path(),
);
set_include_path(implode(PATH_SEPARATOR, $path));

use Zend\Loader\AutoloaderFactory;
use Zend\Loader\StandardAutoloader;

require_once  'Zend/Loader/AutoloaderFactory.php';
require_once  'Zend/Loader/StandardAutoloader.php';

// setup autoloader
AutoloaderFactory::factory(
    array(
    	'Zend\Loader\StandardAutoloader' => array(
            StandardAutoloader::AUTOREGISTER_ZF => true,
            StandardAutoloader::ACT_AS_FALLBACK => false,
            StandardAutoloader::LOAD_NS => $additionalNamespaces,
        )
    )
);

$appConfig = include $rootPath . '/config/application.config.php';

$appConfig['module_listener_options']['config_cache_enabled'] = false;

Zend\Loader\AutoloaderFactory::factory($appConfig['autoloaders']);

$modules = array(
    'ModuleB',
);

$vendorModules = array(
    'VendorModuleA',
);

foreach (array_merge($modules, $vendorModules) as $moduleName) {

    $moduleTestCaseClassname = '\\'.$moduleName.'Test\\Framework\\TestCase';

    $listenerOptions = new Zend\ModuleManager\Listener\ListenerOptions($appConfig['module_listener_options']);
    $defaultListeners = new Zend\ModuleManager\Listener\DefaultListenerAggregate($listenerOptions);
    $moduleManager = new \Zend\ModuleManager\ModuleManager(array($moduleName));
    $moduleManager->getEventManager()->attachAggregate($defaultListeners);
    $moduleManager->loadModules();

    if (method_exists($moduleTestCaseClassname, 'setLocator')) {
        $config = $defaultListeners->getConfigListener()->getMergedConfig();

        $di = new \Zend\Di\Di;
        $di->instanceManager()->addTypePreference('Zend\Di\LocatorInterface', $di);

        $diConfig = new \Zend\Di\Configuration($config['di']);
        $diConfig->configure($di);

        $routerDiConfig = new \Zend\Di\Configuration(
            array(
                'definition' => array(
                    'class' => array(
                        'Zend\Mvc\Router\RouteStackInterface' => array(
                            'instantiator' => array(
                                'Zend\Mvc\Router\Http\TreeRouteStack',
                                'factory'
                            ),
                        ),
                    ),
                ),
            )
        );
        $routerDiConfig->configure($di);

        call_user_func_array($moduleTestCaseClassname.'::setLocator', array($di));
    }

    // When this is in global scope, PHPUnit catches exception:
    // Exception: Zend\Stdlib\PriorityQueue::serialize() must return a string or NULL
    unset($moduleManager);
}

phpunit.xml

<phpunit verbose="true" bootstrap="tests/bootstrap.php">
    <logging>
         <log type="junit" target="build/logs/junit.xml" logIncompleteSkipped="false"/>
    </logging>
    <filter>
        <blacklist>
            <directory>vendor/ZendFramework</directory>
            <directory>vendor/ZfcBase</directory>
            <directory>vendor/ZfcUser</directory>
            <directory suffix=".phtml">module</directory>
        </blacklist>
    </filter>
    <testsuites>
        <testsuite name="VendorModuleA">
            <directory>vendor/VendorModuleA/tests/VendorModuleA</directory>
        </testsuite>
        <testsuite name="ModuleB">
            <directory>module/ModuleB/tests</directory>
        </testsuite>
    </testsuites>
</phpunit>

TestConfiguration.php

<?php
define('ZF2_PATH', realpath(__DIR__ . '/../vendor/ZendFramework/library'));