diff --git a/tests/integration/DoctrineUuidTest.php b/tests/integration/DoctrineUuidTest.php
new file mode 100644
index 0000000..20b8daf
--- /dev/null
+++ b/tests/integration/DoctrineUuidTest.php
@@ -0,0 +1,54 @@
+<?php declare(strict_types=1);
+
+namespace Swag\Braintree\Tests\Integration;
+
+use Swag\Braintree\Entity\ConfigEntity;
+
+class DoctrineUuidTest extends SwagBraintreeTestCase
+{
+    public function testPersistTwice(): void
+    {
+        $em = $this->getEntityManager();
+
+        $shop = $this->createShop();
+        $config = (new ConfigEntity())
+            ->setShop($shop);
+
+        $em->persist($config);
+        $em->flush();
+
+        static::assertNotNull($config->getId());
+        $id = (string) $config->getId();
+
+        $em->persist($config);
+        $em->flush();
+
+        static::assertSame($id, (string) $config->getId());
+    }
+
+    public function testWithRef(): void
+    {
+        $em = $this->getEntityManager();
+
+        $shop = $this->createShop();
+        $config = (new ConfigEntity())
+            ->setShop($shop);
+
+        $em->persist($config);
+        $em->flush();
+
+        static::assertNotNull($config->getId());
+        $id = (string) $config->getId();
+
+        $configRef = $em->getReference(ConfigEntity::class, $id);
+        $configRef->setThreeDSecureEnforced(true);
+
+        $em->persist($configRef);
+        $em->flush();
+
+        $config = $em->find(ConfigEntity::class, $id);
+
+        static::assertSame($id, (string) $config->getId());
+        static::assertTrue($config->isThreeDSecureEnforced());
+    }
+}