diff --git a/RoboFile.php b/RoboFile.php
index 727d9c150b..b73ef0c6d2 100644
--- a/RoboFile.php
+++ b/RoboFile.php
@@ -301,6 +301,15 @@ class RoboFile extends \Robo\Tasks {
     );
   }
 
+  function doctrineGenerateMetadata() {
+    $metadata_dir = \MailPoet\Doctrine\ConfigurationFactory::METADATA_DIR;
+    $this->_exec("rm -rf $metadata_dir");
+
+    $entity_manager = $this->createDoctrineEntityManager();
+    $entity_manager->getMetadataFactory()->getAllMetadata();
+    $this->say("Doctrine metadata generated to: $metadata_dir");
+  }
+
   function qa() {
     $collection = $this->collectionBuilder();
     $collection->addCode([$this, 'qaLint']);
@@ -902,4 +911,15 @@ class RoboFile extends \Robo\Tasks {
     $php_config->usePersistent();
     return $exitCode;
   }
+
+  private function createDoctrineEntityManager() {
+    define('ABSPATH', getenv('WP_ROOT') . '/');
+    \MailPoet\Config\Env::$db_prefix = '';
+    $configuration = (new \MailPoet\Doctrine\ConfigurationFactory(true))->createConfiguration();
+    $platform_class = \MailPoet\Doctrine\ConnectionFactory::PLATFORM_CLASS;
+    return \MailPoetVendor\Doctrine\ORM\EntityManager::create([
+      'driver' => \MailPoet\Doctrine\ConnectionFactory::DRIVER,
+      'platform' => new $platform_class,
+    ], $configuration);
+  }
 }
diff --git a/build.sh b/build.sh
index 26a16d8d56..b664eb31a0 100755
--- a/build.sh
+++ b/build.sh
@@ -27,6 +27,10 @@ echo '[BUILD] Building DI Container cache'
 ./composer.phar install
 ./do container:dump
 
+# Generate Doctrine metadata
+echo '[BUILD] Generating Doctrine Metadata'
+./do doctrine:generate-metadata
+
 # Backup dev libraries
 echo '[BUILD] Backup dev dependencies'
 if [ -d 'vendor' ]; then
diff --git a/lib/Doctrine/ConfigurationFactory.php b/lib/Doctrine/ConfigurationFactory.php
index 209233411b..b76b787454 100644
--- a/lib/Doctrine/ConfigurationFactory.php
+++ b/lib/Doctrine/ConfigurationFactory.php
@@ -19,8 +19,8 @@ class ConfigurationFactory {
   /** @var bool */
   private $is_dev_mode;
 
-  function __construct() {
-    $this->is_dev_mode = WP_DEBUG;
+  function __construct($is_dev_mode = null) {
+    $this->is_dev_mode = $is_dev_mode === null ? WP_DEBUG : $is_dev_mode;
   }
 
   function createConfiguration() {