diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 37376e9b0d..64f0b50fa4 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -11,6 +11,10 @@
          syntaxCheck="false"
          bootstrap="autoload.php.dist"
 >
+    <php>
+        <ini name="intl.default_locale" value="en"/>
+    </php>
+
     <testsuites>
         <testsuite name="Symfony Test Suite">
             <directory>./src/Symfony/Bridge/*/Tests/</directory>