diff --git a/tests/Doctrine/Tests/ORM/EntityManagerTest.php b/tests/Doctrine/Tests/ORM/EntityManagerTest.php
index c24867555..37a444a60 100644
--- a/tests/Doctrine/Tests/ORM/EntityManagerTest.php
+++ b/tests/Doctrine/Tests/ORM/EntityManagerTest.php
@@ -2,15 +2,6 @@
 
 namespace Doctrine\Tests\ORM;
 
-use Doctrine\DBAL\Logging\DebugStack;
-use Doctrine\DBAL\Logging\SQLLogger;
-use Doctrine\ORM\Configuration;
-use Doctrine\ORM\EntityManager;
-use Doctrine\ORM\Tools\SchemaTool;
-use Doctrine\ORM\Tools\ToolsException;
-use Doctrine\Tests\Models\Generic\DateTimeModel;
-use Doctrine\Tests\TestUtil;
-
 class EntityManagerTest extends \Doctrine\Tests\OrmTestCase
 {
     private $_em;
@@ -204,193 +195,4 @@ class EntityManagerTest extends \Doctrine\Tests\OrmTestCase
         $this->assertSame($this->_em, $em);
         return 'callback';
     }
-
-    /**
-     * @group DDC-1392
-     * @group DDC-1734
-     * @group DDC-3368
-     * @group #1172
-     */
-    public function testMergeDetachedUnInitializedProxy()
-    {
-        $em = $this->createEntityManager();
-
-        $detachedUninitialized = $em->getReference(DateTimeModel::CLASSNAME, 123);
-
-        $em->clear();
-
-        $managed = $em->getReference(DateTimeModel::CLASSNAME, 123);
-
-        $this->assertSame($managed, $em->merge($detachedUninitialized));
-
-        $this->assertFalse($managed->__isInitialized());
-        $this->assertFalse($detachedUninitialized->__isInitialized());
-    }
-
-    public function testMergeUnserializedUnInitializedProxy()
-    {
-        $em = $this->createEntityManager();
-
-        $detachedUninitialized = $em->getReference(DateTimeModel::CLASSNAME, 123);
-
-        $em->clear();
-
-        $managed = $em->getReference(DateTimeModel::CLASSNAME, 123);
-
-        $this->assertSame(
-            $managed,
-            $em->merge(unserialize(serialize($em->merge($detachedUninitialized))))
-        );
-
-        $this->assertFalse($managed->__isInitialized());
-        $this->assertFalse($detachedUninitialized->__isInitialized());
-    }
-
-    public function testMergeManagedProxy()
-    {
-        $em = $this->createEntityManager();
-
-        $managed = $em->getReference(DateTimeModel::CLASSNAME, 123);
-
-        $this->assertSame($managed, $em->merge($managed));
-
-        $this->assertFalse($managed->__isInitialized());
-    }
-
-    public function testMergingProxyFromDifferentEntityManagerWithExistingManagedInstanceDoesNotReplaceInitializer()
-    {
-        $em1 = $this->createEntityManager($logger1 = new DebugStack());
-        $em2 = $this->createEntityManager($logger2 = new DebugStack());
-
-        $entity1 = new DateTimeModel();
-        $entity2 = new DateTimeModel();
-
-        $em1->persist($entity1);
-        $em2->persist($entity2);
-        $em1->flush();
-        $em2->flush();
-        $em1->clear();
-        $em2->clear();
-
-        $queryCount1 = count($logger1->queries);
-        $queryCount2 = count($logger2->queries);
-
-        $proxy1  = $em1->getReference(DateTimeModel::CLASSNAME, $entity1->id);
-        $proxy2  = $em2->getReference(DateTimeModel::CLASSNAME, $entity1->id);
-        $merged2 = $em2->merge($proxy1);
-
-        $this->assertNotSame($proxy1, $merged2);
-        $this->assertSame($proxy2, $merged2);
-
-        $this->assertFalse($proxy1->__isInitialized());
-        $this->assertFalse($proxy2->__isInitialized());
-
-        $proxy1->__load();
-
-        $this->assertCount(
-            $queryCount1 + 1,
-            $logger1->queries,
-            'Loading the first proxy was done through the first entity manager'
-        );
-        $this->assertCount(
-            $queryCount2,
-            $logger2->queries,
-            'No queries were executed on the second entity manager, as it is unrelated with the first proxy'
-        );
-
-        $proxy2->__load();
-
-        $this->assertCount(
-            $queryCount1 + 1,
-            $logger1->queries,
-            'Loading the second proxy does not affect the first entity manager'
-        );
-        $this->assertCount(
-            $queryCount2 + 1,
-            $logger2->queries,
-            'Loading of the second proxy instance was done through the second entity manager'
-        );
-    }
-
-    public function testMergingUnInitializedProxyDoesNotInitializeIt()
-    {
-        $em1 = $this->createEntityManager($logger1 = new DebugStack());
-        $em2 = $this->createEntityManager($logger2 = new DebugStack());
-
-        $entity1 = new DateTimeModel();
-        $entity2 = new DateTimeModel();
-
-        $em1->persist($entity1);
-        $em2->persist($entity2);
-        $em1->flush();
-        $em2->flush();
-        $em1->clear();
-        $em2->clear();
-
-        $queryCount1 = count($logger1->queries);
-        $queryCount2 = count($logger1->queries);
-
-        $unManagedProxy = $em1->getReference(DateTimeModel::CLASSNAME, $entity1->id);
-        $mergedInstance = $em2->merge($unManagedProxy);
-
-        $this->assertNotInstanceOf('Doctrine\Common\Proxy\Proxy', $mergedInstance);
-        $this->assertNotSame($unManagedProxy, $mergedInstance);
-        $this->assertFalse($unManagedProxy->__isInitialized());
-
-        $this->assertCount(
-            $queryCount1,
-            $logger1->queries,
-            'Loading the merged instance affected only the first entity manager'
-        );
-        $this->assertCount(
-            $queryCount1 + 1,
-            $logger2->queries,
-            'Loading the merged instance was done via the second entity manager'
-        );
-
-        $unManagedProxy->__load();
-
-        $this->assertCount(
-            $queryCount1 + 1,
-            $logger1->queries,
-            'Loading the first proxy was done through the first entity manager'
-        );
-        $this->assertCount(
-            $queryCount2 + 1,
-            $logger2->queries,
-            'No queries were executed on the second entity manager, as it is unrelated with the first proxy'
-        );
-    }
-
-    /**
-     * @param SQLLogger $logger
-     *
-     * @return \Doctrine\ORM\EntityManager
-     */
-    private function createEntityManager(SQLLogger $logger = null)
-    {
-        $config = new Configuration();
-
-        $config->setProxyDir(realpath(__DIR__ . '/../Proxies/../..'));
-        $config->setProxyNamespace('Doctrine\Tests\Proxies');
-        $config->setMetadataDriverImpl($config->newDefaultAnnotationDriver(
-            array(realpath(__DIR__ . '/../Models/Cache')),
-            true
-        ));
-
-        $connection = TestUtil::getConnection();
-
-        $connection->getConfiguration()->setSQLLogger($logger);
-
-        $entityManager = EntityManager::create($connection, $config);
-
-        try {
-            (new SchemaTool($entityManager))
-                ->createSchema([$entityManager->getClassMetadata(DateTimeModel::CLASSNAME)]);
-        } catch (ToolsException $ignored) {
-            // tables were already created
-        }
-
-        return $entityManager;
-    }
 }