Doctrine named native queries and resultset mapping

Code
<?php

use Doctrine\ORM\Mapping as A;

/**
 * @A\NamedNativeQueries({
 *   @A\NamedNativeQuery(
 *     name = "myTestQuery",
 *     resultSetMapping = "mappingTest",
 *     query = "SELECT id, creation_date FROM test WHERE name = 'foo'" 
 *   )
 * })
 * @A\SqlResultSetMappings({
 *   @A\SqlResultSetMapping(
 *     name = "mappingTest",
 *     entities= {
 *       @A\EntityResult(
 *         entityClass = "__CLASS__",
 *         fields = {
 *           @A\FieldResult(name = "id"),
 *           @A\FieldResult(name = "creationDate", column="creation_date")
 *         }
 *       )
 *     }
 *   )
 * })
 *
 * @A\Entity
 * @A\Table(name="test")
 */
class Test
{
    
/**
     * @A\Column(type="integer", name="id")
     * @A\Id
     * @A\GeneratedValue(strategy="AUTO")
     */
    
public $id;
    
    
/** 
     * @A\Column(type="string", name="name", length=255)
     */
    
public $name;
    
    
/** 
     * @A\Column(type="datetime", name="creation_date", nullable=true)
     */
    
public $creationDate;
}

$query $entityManager->getRepository(Test::class)
    ->
createNativeNamedQuery('myTestQuery')
    ->
getResult();

dump(
    
$query[0]->id,
    
$query[0]->name,
    
$query[0]->creationDate->format('Y-m-d H:i:s')
);
Result
1

null

"2014-07-20 11:37:29"
Used Versions
PHP 7.1, Zend 3.0, Symfony 3.2, Laravel 5.2, PHPUnit 5.6, Doctrine 2.6