diff --git a/bin/phpunit-wrapper.php b/bin/phpunit-wrapper.php
index c5478c39..5ef61238 100644
--- a/bin/phpunit-wrapper.php
+++ b/bin/phpunit-wrapper.php
@@ -15,8 +15,8 @@
 
     foreach ($composerAutoloadFiles as $file) {
         if (file_exists($file)) {
-            require_once $file;
             define('PHPUNIT_COMPOSER_INSTALL', $file);
+            require_once $file;
 
             break;
         }