diff --git a/eZ/Bundle/EzPublishCoreBundle/Tests/Entity/EntityManagerFactoryTest.php b/eZ/Bundle/EzPublishCoreBundle/Tests/Entity/EntityManagerFactoryTest.php
index 37b6b9533a..6596bdea98 100644
--- a/eZ/Bundle/EzPublishCoreBundle/Tests/Entity/EntityManagerFactoryTest.php
+++ b/eZ/Bundle/EzPublishCoreBundle/Tests/Entity/EntityManagerFactoryTest.php
@@ -34,7 +34,7 @@ class EntityManagerFactoryTest extends TestCase
     /** @var \Symfony\Component\DependencyInjection\ServiceLocator */
     private $serviceLocator;
 
-    public function setUp()
+    public function setUp(): void
     {
         $this->repositoryConfigurationProvider = $this->getRepositoryConfigurationProvider();
         $this->entityManager = $this->getEntityManager();