diff --git a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit
index 873797900a4e7..74b18f9378ea7 100755
--- a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit
+++ b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit
@@ -16,7 +16,7 @@
 error_reporting(-1);
 
 // PHPUnit 4.8 does not support PHP 7, while 5.1 requires PHP 5.6+
-$PHPUNIT_VERSION = PHP_VERSION_ID >= 50600 ? getenv('SYMFONY_PHPUNIT_VERSION') ?: '5.3' : '4.8';
+$PHPUNIT_VERSION = PHP_VERSION_ID >= 50600 ? getenv('SYMFONY_PHPUNIT_VERSION') ?: '5.7' : '4.8';
 $oldPwd = getcwd();
 $PHPUNIT_DIR = getenv('SYMFONY_PHPUNIT_DIR') ?: (__DIR__.'/.phpunit');
 $PHP = defined('PHP_BINARY') ? PHP_BINARY : 'php';