Use the EntityIdTrait

Test.php

<?php

namespace App\Entity;

use App\Entity\Traits\EntityIdTrait;
use App\Repository\TestRepository;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity(repositoryClass=TestRepository::class)
 */
class Test
{
    use EntityIdTrait;

    /**
     * @ORM\Column(type="string", length=255, nullable=true)
     */
    private $name;

    public function getName(): ?string
    {
        return $this->name;
    }

    public function setName(?string $name): self
    {
        $this->name = $name;

        return $this;
    }
}