diff --git a/src/Symfony/Component/Translation/Tests/IdentityTranslatorTest.php b/src/Symfony/Component/Translation/Tests/IdentityTranslatorTest.php
index a630a7a3ce..16945d38a2 100644
--- a/src/Symfony/Component/Translation/Tests/IdentityTranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/IdentityTranslatorTest.php
@@ -23,6 +23,7 @@ class IdentityTranslatorTest extends TranslatorTest
         parent::setUp();
 
         $this->defaultLocale = \Locale::getDefault();
+        \Locale::setDefault('en');
     }
 
     protected function tearDown(): void