diff --git a/tools/sandbox/cli-config.php b/tools/sandbox/cli-config.php
index 46230ba273..c949668e00 100644
--- a/tools/sandbox/cli-config.php
+++ b/tools/sandbox/cli-config.php
@@ -2,11 +2,11 @@
 
 require_once '../../lib/vendor/doctrine-common/lib/Doctrine/Common/ClassLoader.php';
 
-$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\\ORM', realpath(__DIR__ . '/../../lib'));
+$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\ORM', realpath(__DIR__ . '/../../lib'));
 $classLoader->register();
-$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\\DBAL', realpath(__DIR__ . '/../../lib/vendor/doctrine-dbal/lib'));
+$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\DBAL', realpath(__DIR__ . '/../../lib/vendor/doctrine-dbal/lib'));
 $classLoader->register();
-$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\\Common', realpath(__DIR__ . '/../../lib/vendor/doctrine-common/lib'));
+$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\Common', realpath(__DIR__ . '/../../lib/vendor/doctrine-common/lib'));
 $classLoader->register();
 $classLoader = new \Doctrine\Common\ClassLoader('Symfony', realpath(__DIR__ . '/../../lib/vendor'));
 $classLoader->register();
diff --git a/tools/sandbox/doctrine.php b/tools/sandbox/doctrine.php
index 918e6e5e7c..9d498d4403 100644
--- a/tools/sandbox/doctrine.php
+++ b/tools/sandbox/doctrine.php
@@ -2,11 +2,11 @@
 
 require_once '../../lib/vendor/doctrine-common/lib/Doctrine/Common/ClassLoader.php';
 
-$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\\ORM', realpath(__DIR__ . '/../../lib'));
+$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\ORM', realpath(__DIR__ . '/../../lib'));
 $classLoader->register();
-$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\\DBAL', realpath(__DIR__ . '/../../lib/vendor/doctrine-dbal/lib'));
+$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\DBAL', realpath(__DIR__ . '/../../lib/vendor/doctrine-dbal/lib'));
 $classLoader->register();
-$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\\Common', realpath(__DIR__ . '/../../lib/vendor/doctrine-common/lib'));
+$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\Common', realpath(__DIR__ . '/../../lib/vendor/doctrine-common/lib'));
 $classLoader->register();
 $classLoader = new \Doctrine\Common\ClassLoader('Symfony', realpath(__DIR__ . '/../../lib/vendor'));
 $classLoader->register();
diff --git a/tools/sandbox/index.php b/tools/sandbox/index.php
index 69e1eb359a..ad1cb9d6b1 100644
--- a/tools/sandbox/index.php
+++ b/tools/sandbox/index.php
@@ -19,11 +19,11 @@
 
 // Set up class loading. You could use different autoloaders, provided by your favorite framework,
 // if you want to.
-$classLoader = new ClassLoader('Doctrine\\ORM', realpath(__DIR__ . '/../../lib'));
+$classLoader = new ClassLoader('Doctrine\ORM', realpath(__DIR__ . '/../../lib'));
 $classLoader->register();
-$classLoader = new ClassLoader('Doctrine\\DBAL', realpath(__DIR__ . '/../../lib/vendor/doctrine-dbal/lib'));
+$classLoader = new ClassLoader('Doctrine\DBAL', realpath(__DIR__ . '/../../lib/vendor/doctrine-dbal/lib'));
 $classLoader->register();
-$classLoader = new ClassLoader('Doctrine\\Common', realpath(__DIR__ . '/../../lib/vendor/doctrine-common/lib'));
+$classLoader = new ClassLoader('Doctrine\Common', realpath(__DIR__ . '/../../lib/vendor/doctrine-common/lib'));
 $classLoader->register();
 $classLoader = new ClassLoader('Symfony', realpath(__DIR__ . '/../../lib/vendor'));
 $classLoader->register();