diff --git a/tests/Doctrine/Tests/ORM/Functional/Ticket/GH6699Test.php b/tests/Doctrine/Tests/ORM/Functional/Ticket/GH6699Test.php
new file mode 100644
index 00000000000..53b6c0336a2
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Functional/Ticket/GH6699Test.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+use Doctrine\Tests\Models\CMS\CmsUser;
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+/**
+ * @group #6699
+ */
+class GH6699Test extends OrmFunctionalTestCase
+{
+    protected function setUp()
+    {
+        $this->useModelSet('cms');
+        parent::setUp();
+    }
+
+    public function testMixedParametersWithZeroNumber()
+    {
+        $qb = $this->_em->createQueryBuilder()
+            ->select('u')
+            ->from(CmsUser::class, 'u')
+            ->andWhere('u.email = :email')
+            ->andWhere('u.id = ?0');
+        $query = $qb->getQuery();
+
+        $query->setParameter('email', 'bar');
+        $query->setParameter(0, 0);
+
+        $query->execute();
+
+        $this->assertSame(2, $query->getParameters()->count());
+        $this->assertSame(0, $query->getParameter(0)->getValue());
+        $this->assertSame('bar', $query->getParameter('email')->getValue());
+    }
+}
+