diff --git a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC3634Test.php b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC3634Test.php
index 6139ce540..6cbc0158f 100644
--- a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC3634Test.php
+++ b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC3634Test.php
@@ -19,6 +19,8 @@ class DDC3634Test extends OrmFunctionalTestCase {
         try {
             $this->_schemaTool->createSchema([
                 $this->_em->getClassMetadata(DDC3634Entity::CLASSNAME),
+                $this->_em->getClassMetadata(DDC3634JTIBaseEntity::CLASSNAME),
+                $this->_em->getClassMetadata(DDC3634JTIChildEntity::CLASSNAME),
             ]);
         } catch (ToolsException $e) {
             // schema already in place
@@ -51,6 +53,16 @@ class DDC3634Test extends OrmFunctionalTestCase {
 
         $this->assertInternalType('string', $entity->id);
     }
+
+    public function testSavesIntegerAutoGeneratedValueAsStringWithJoinedInheritance()
+    {
+        $entity = new DDC3634JTIChildEntity();
+
+        $this->_em->persist($entity);
+        $this->_em->flush();
+
+        $this->assertInternalType('string', $entity->id);
+    }
 }
 
 /** @Entity */
@@ -62,6 +74,28 @@ class DDC3634Entity
     public $id;
 }
 
+/**
+ * @Entity
+ * @InheritanceType("JOINED")
+ * @DiscriminatorMap({
+ *  DDC3634JTIBaseEntity::class  = DDC3634JTIBaseEntity::class,
+ *  DDC3634JTIChildEntity::class = DDC3634JTIChildEntity::class,
+ * })
+ */
+class DDC3634JTIBaseEntity
+{
+    const CLASSNAME = __CLASS__;
+
+    /** @Id @Column(type="bigint") @GeneratedValue(strategy="AUTO") */
+    public $id;
+}
+
+/** @Entity */
+class DDC3634JTIChildEntity extends DDC3634JTIBaseEntity
+{
+    const CLASSNAME = __CLASS__;
+}
+
 class DDC3634LastInsertIdMockingConnection extends Connection
 {
     /**