diff --git a/tests/Doctrine/Tests/ORM/Functional/Locking/GearmanLockTest.php b/tests/Doctrine/Tests/ORM/Functional/Locking/GearmanLockTest.php
new file mode 100644
index 000000000..ced552422
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Functional/Locking/GearmanLockTest.php
@@ -0,0 +1,177 @@
+<?php
+
+namespace Doctrine\Tests\ORM\Functional\Locking;
+
+use Doctrine\Tests\Models\CMS\CmsArticle,
+    Doctrine\Tests\Models\CMS\CmsUser,
+    Doctrine\ORM\LockMode,
+    Doctrine\ORM\EntityManager;
+
+require_once __DIR__ . '/../../../TestInit.php';
+
+class GearmanLockTest extends \Doctrine\Tests\OrmFunctionalTestCase
+{
+    private $gearman = null;
+    private $maxRunTime = 0;
+    private $articleId;
+
+    protected function setUp()
+    {
+        if (!class_exists('GearmanClient', false)) {
+            $this->markTestSkipped('pecl/gearman is required for this test to run.');
+        }
+
+        $this->useModelSet('cms');
+        parent::setUp();
+        $this->tasks = array();
+
+        $this->gearman = new \GearmanClient();
+        $this->gearman->addServer();
+        $this->gearman->setCompleteCallback(array($this, "gearmanTaskCompleted"));
+
+        $article = new CmsArticle();
+        $article->text = "my article";
+        $article->topic = "Hello";
+
+        $this->_em->persist($article);
+        $this->_em->flush();
+
+        $this->articleId = $article->id;
+    }
+
+    public function gearmanTaskCompleted($task)
+    {
+        $this->maxRunTime = max($this->maxRunTime, $task->data());
+    }
+
+    public function testFindWithLock()
+    {
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+        
+        $this->assertLockWorked();
+    }
+
+    public function testFindWithWriteThenReadLock()
+    {
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_READ);
+
+        $this->assertLockWorked();
+    }
+
+    public function testFindWithReadThenWriteLock()
+    {
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_READ);
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+
+        $this->assertLockWorked();
+    }
+
+    public function testFindWithOneLock()
+    {
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::NONE);
+
+        $this->assertLockDoesNotBlock();
+    }
+
+    public function testDqlWithLock()
+    {
+        $this->asyncDqlWithLock('SELECT a FROM Doctrine\Tests\Models\CMS\CmsArticle a', array(), LockMode::PESSIMISTIC_WRITE);
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+
+        $this->assertLockWorked();
+    }
+
+    public function testLock()
+    {
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+        $this->asyncLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+
+        $this->assertLockWorked();
+    }
+
+    public function testLock2()
+    {
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+        $this->asyncLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_READ);
+
+        $this->assertLockWorked();
+    }
+
+    public function testLock3()
+    {
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_READ);
+        $this->asyncLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+
+        $this->assertLockWorked();
+    }
+
+    public function testLock4()
+    {
+        $this->asyncFindWithLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::NONE);
+        $this->asyncLock('Doctrine\Tests\Models\CMS\CmsArticle', $this->articleId, LockMode::PESSIMISTIC_WRITE);
+
+        $this->assertLockDoesNotBlock();
+    }
+
+    protected function assertLockDoesNotBlock()
+    {
+        $this->assertLockWorked($onlyForSeconds = 1);
+    }
+
+    protected function assertLockWorked($forTime = 2, $notLongerThan = null)
+    {
+        if ($notLongerThan === null) {
+            $notLongerThan = $forTime + 1;
+        }
+
+        $this->gearman->runTasks();
+
+        $this->assertTrue($this->maxRunTime > $forTime,
+            "Because of locking this tests should have run at least " . $forTime . " seconds, ".
+            "but only did for " . $this->maxRunTime . " seconds.");
+        $this->assertTrue($this->maxRunTime < $notLongerThan,
+            "The longest task should not run longer than " . $notLongerThan . " seconds, ".
+            "but did for " . $this->maxRunTime . " seconds."
+        );
+    }
+
+    protected function asyncFindWithLock($entityName, $entityId, $lockMode)
+    {
+        $this->startGearmanJob('findWithLock', array(
+            'entityName' => $entityName,
+            'entityId' => $entityId,
+            'lockMode' => $lockMode,
+        ));
+    }
+
+    protected function asyncDqlWithLock($dql, $params, $lockMode)
+    {
+        $this->startGearmanJob('dqlWithLock', array(
+            'dql' => $dql,
+            'dqlParams' => $params,
+            'lockMode' => $lockMode,
+        ));
+    }
+
+    protected function asyncLock($entityName, $entityId, $lockMode)
+    {
+        $this->startGearmanJob('lock', array(
+            'entityName' => $entityName,
+            'entityId' => $entityId,
+            'lockMode' => $lockMode,
+        ));
+    }
+
+    protected function startGearmanJob($fn, $fixture)
+    {
+        $this->gearman->addTask($fn, serialize(array(
+            'conn' => $this->_em->getConnection()->getParams(),
+            'fixture' => $fixture
+        )));
+
+        $this->assertEquals(GEARMAN_SUCCESS, $this->gearman->returnCode());
+    }
+}
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Functional/Locking/LockAgentWorker.php b/tests/Doctrine/Tests/ORM/Functional/Locking/LockAgentWorker.php
new file mode 100644
index 000000000..6b1e6d488
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Functional/Locking/LockAgentWorker.php
@@ -0,0 +1,111 @@
+<?php
+
+namespace Doctrine\Tests\ORM\Functional\Locking;
+
+require_once __DIR__ . "/../../../TestInit.php";
+
+class LockAgentWorker
+{
+    private $em;
+
+    static public function run()
+    {
+        $lockAgent = new LockAgentWorker();
+
+        $worker = new \GearmanWorker();
+        $worker->addServer();
+        $worker->addFunction("findWithLock", array($lockAgent, "findWithLock"));
+        $worker->addFunction("dqlWithLock", array($lockAgent, "dqlWithLock"));
+        $worker->addFunction('lock', array($lockAgent, 'lock'));
+
+        while($worker->work()) {
+            if ($worker->returnCode() != GEARMAN_SUCCESS) {
+                echo "return_code: " . $worker->returnCode() . "\n";
+                break;
+            }
+        }
+    }
+
+    protected function process($job, \Closure $do)
+    {
+        $fixture = $this->processWorkload($job);
+
+        $s = microtime(true);
+        $this->em->beginTransaction();
+        $do($fixture, $this->em);
+
+        sleep(1);
+        $this->em->rollback();
+        $this->em->clear();
+        $this->em->close();
+        $this->em->getConnection()->close();
+
+        return (microtime(true) - $s);
+    }
+
+    public function findWithLock($job)
+    {
+        return $this->process($job, function($fixture, $em) {
+            $entity = $em->find($fixture['entityName'], $fixture['entityId'], $fixture['lockMode']);
+        });
+    }
+
+    public function dqlWithLock($job)
+    {
+        return $this->process($job, function($fixture, $em) {
+            /* @var $query Doctrine\ORM\Query */
+            $query = $em->createQuery($fixture['dql']);
+            $query->setLockMode($fixture['lockMode']);
+            $query->setParameters($fixture['dqlParams']);
+            $result = $query->getResult();
+        });
+    }
+
+    public function lock($job)
+    {
+        return $this->process($job, function($fixture, $em) {
+            $entity = $em->find($fixture['entityName'], $fixture['entityId']);
+            $em->lock($entity, $fixture['lockMode']);
+        });
+    }
+
+    protected function processWorkload($job)
+    {
+        echo "Received job: " . $job->handle() . " for function " . $job->functionName() . "\n";
+
+        $workload = $job->workload();
+        $workload = unserialize($workload);
+
+        if (!isset($workload['conn']) || !is_array($workload['conn'])) {
+            throw new \InvalidArgumentException("Missing Database parameters");
+        }
+
+        $this->em = $this->createEntityManager($workload['conn']);
+
+        if (!isset($workload['fixture'])) {
+            throw new \InvalidArgumentException("Missing Fixture parameters");
+        }
+        return $workload['fixture'];
+    }
+
+    protected function createEntityManager($conn)
+    {
+        $config = new \Doctrine\ORM\Configuration();
+        $config->setProxyDir(__DIR__ . '/../../../Proxies');
+        $config->setProxyNamespace('MyProject\Proxies');
+        $config->setAutoGenerateProxyClasses(true);
+
+        $annotDriver = $config->newDefaultAnnotationDriver(array(__DIR__ . '/../../../Models/'));
+        $config->setMetadataDriverImpl($annotDriver);
+
+        $cache = new \Doctrine\Common\Cache\ArrayCache();
+        $config->setMetadataCacheImpl($cache);
+        $config->setQueryCacheImpl($cache);
+
+        $em = \Doctrine\ORM\EntityManager::create($conn, $config);
+
+        return $em;
+    }
+}
+
+LockAgentWorker::run();
\ No newline at end of file
diff --git a/tests/README.markdown b/tests/README.markdown
new file mode 100644
index 000000000..c1027aced
--- /dev/null
+++ b/tests/README.markdown
@@ -0,0 +1,25 @@
+# Running the Doctrine 2 Testsuite
+
+## Setting up a PHPUnit Configuration XML
+
+..
+
+## Testing Lock-Support
+
+The Lock support in Doctrine 2 is tested using Gearman, which allows to run concurrent tasks in parallel.
+Install Gearman with PHP as follows:
+
+1. Go to http://www.gearman.org and download the latest Gearman Server
+2. Compile it and then call ldconfig
+3. Start it up "gearmand -vvvv"
+4. Install pecl/gearman by calling "gearman-beta"
+
+You can then go into tests/ and start up two workers:
+
+    php Doctrine/Tests/ORM/Functional/Locking/LockAgentWorker.php
+
+Then run the locking test-suite:
+
+    phpunit --configuration <myconfig.xml> Doctrine/Tests/ORM/Functional/Locking/GearmanLockTest.php
+
+This can run considerable time, because it is using sleep() to test for the timing ranges of locks.
\ No newline at end of file