diff --git a/README.md b/README.md
index ef4a6e7..c3a053f 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,6 @@ In order to configure the different Doctrine manager builders head to [juliangut
 Register managers in the DI container as any other service.
 
 ```php
-use Jgut\Doctrine\ManagerBuilder\ManagerBuilder as Builder;
 use Jgut\Slim\Doctrine\ManagerBuilder;
 use Slim\App;
 
@@ -90,7 +89,7 @@ $settings = [
         ],
         'metadata_mapping' => [
             [
-                'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                 'path' => 'path/to/annotation/mappings',
             ],
         ],
@@ -119,7 +118,6 @@ $app->get('/', function () {
 Register manager builder in the DI container to delegate managers creation.
 
 ```php
-use Jgut\Doctrine\ManagerBuilder\ManagerBuilder as Builder;
 use Jgut\Slim\Doctrine\ManagerBuilder;
 use Interop\Container\ContainerInterface;
 use Slim\App;
@@ -134,7 +132,7 @@ $settings = [
                 ],
                 'metadata_mapping' => [
                     [
-                        'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                        'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                         'path' => 'path/to/annotation/mappings',
                     ],
                 ],
@@ -145,7 +143,7 @@ $settings = [
                 ],
                 'metadata_mapping' => [
                     [
-                        'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                        'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                         'path' => 'path/to/annotation/mappings',
                     ],
                 ],
diff --git a/src/ManagerBuilder.php b/src/ManagerBuilder.php
index bb999e6..ed11878 100644
--- a/src/ManagerBuilder.php
+++ b/src/ManagerBuilder.php
@@ -20,6 +20,11 @@
  */
 class ManagerBuilder
 {
+    const METADATA_MAPPING_ANNOTATION = Builder::METADATA_MAPPING_ANNOTATION;
+    const METADATA_MAPPING_XML = Builder::METADATA_MAPPING_XML;
+    const METADATA_MAPPING_YAML = Builder::METADATA_MAPPING_YAML;
+    const METADATA_MAPPING_PHP = Builder::METADATA_MAPPING_PHP;
+
     /**
      * @var Builder[]
      */
diff --git a/tests/Doctrine/ManagerBuilderTest.php b/tests/Doctrine/ManagerBuilderTest.php
index fdd06ff..fdf2896 100644
--- a/tests/Doctrine/ManagerBuilderTest.php
+++ b/tests/Doctrine/ManagerBuilderTest.php
@@ -12,7 +12,6 @@
 use Doctrine\ODM\CouchDB\DocumentManager as CouchDBDocumentManager;
 use Doctrine\ODM\MongoDB\DocumentManager as MongoDBDocumentManager;
 use Doctrine\ORM\EntityManager;
-use Jgut\Doctrine\ManagerBuilder\ManagerBuilder as Builder;
 use Jgut\Doctrine\ManagerBuilder\RelationalBuilder;
 use Jgut\Slim\Doctrine\ManagerBuilder;
 
@@ -31,7 +30,7 @@ public function testSingleManagers()
                 ],
                 'metadata_mapping' => [
                     [
-                        'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                        'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                         'path' => __DIR__,
                     ],
                 ],
@@ -43,7 +42,7 @@ public function testSingleManagers()
                 ],
                 'metadata_mapping' => [
                     [
-                        'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                        'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                         'path' => __DIR__,
                     ],
                 ],
@@ -55,7 +54,7 @@ public function testSingleManagers()
                 ],
                 'metadata_mapping' => [
                     [
-                        'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                        'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                         'path' => __DIR__,
                     ],
                 ],
@@ -93,7 +92,7 @@ public function testDuplicatedNamedManager()
                     ],
                     'metadata_mapping' => [
                         [
-                            'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                            'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                             'path' => __DIR__,
                         ],
                     ],
@@ -107,7 +106,7 @@ public function testDuplicatedNamedManager()
                     ],
                     'metadata_mapping' => [
                         [
-                            'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                            'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                             'path' => __DIR__,
                         ],
                     ],
@@ -134,7 +133,7 @@ public function testNoRegisteredManager()
                 ],
                 'metadata_mapping' => [
                     [
-                        'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                        'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                         'path' => __DIR__,
                     ],
                 ],
@@ -171,7 +170,7 @@ public function testCLIApplication()
                     ],
                     'metadata_mapping' => [
                         [
-                            'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                            'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                             'path' => __DIR__,
                         ],
                     ],
@@ -185,7 +184,7 @@ public function testCLIApplication()
                     ],
                     'metadata_mapping' => [
                         [
-                            'type' => Builder::METADATA_MAPPING_ANNOTATION,
+                            'type' => ManagerBuilder::METADATA_MAPPING_ANNOTATION,
                             'path' => __DIR__,
                         ],
                     ],