diff --git a/bin/phpunit-wrapper.php b/bin/phpunit-wrapper.php
index 73e47ea8..9af18075 100644
--- a/bin/phpunit-wrapper.php
+++ b/bin/phpunit-wrapper.php
@@ -25,8 +25,8 @@
 
     foreach ($composerAutoloadFiles as $file) {
         if (file_exists($file)) {
-            require_once $file;
             define('PHPUNIT_COMPOSER_INSTALL', $file);
+            require_once $file;
 
             break;
         }