diff --git a/tools/sandbox/config.php b/tools/sandbox/config.php
index 59eaa2db2f..bed1855ae3 100644
--- a/tools/sandbox/config.php
+++ b/tools/sandbox/config.php
@@ -3,7 +3,6 @@
 declare(strict_types=1);
 
 use Doctrine\Common\Annotations\AnnotationRegistry;
-use Doctrine\MongoDB\Connection;
 use Doctrine\ODM\MongoDB\Configuration;
 use Doctrine\ODM\MongoDB\DocumentManager;
 use Doctrine\ODM\MongoDB\Mapping\Driver\AnnotationDriver;
@@ -18,8 +17,6 @@
 $loader->add('Documents', __DIR__);
 AnnotationRegistry::registerLoader([$loader, 'loadClass']);
 
-$connection = new Connection();
-
 $config = new Configuration();
 $config->setProxyDir(__DIR__ . '/Proxies');
 $config->setProxyNamespace('Proxies');
@@ -30,4 +27,4 @@
 // $config->setMetadataCacheImpl(new Doctrine\Common\Cache\ApcCache());
 $config->setMetadataDriverImpl(AnnotationDriver::create(__DIR__ . '/Documents'));
 
-$dm = DocumentManager::create($connection, $config);
+$dm = DocumentManager::create(null, $config);