diff --git a/src/Testing/PHPUnit/AbstractLazyTestCase.php b/src/Testing/PHPUnit/AbstractLazyTestCase.php
index 720990bc0ac..1beba2eaf45 100644
--- a/src/Testing/PHPUnit/AbstractLazyTestCase.php
+++ b/src/Testing/PHPUnit/AbstractLazyTestCase.php
@@ -61,7 +61,9 @@ protected function isWindows(): bool
 
     private function includePreloadFilesAndScoperAutoload(): void
     {
-        if (file_exists(__DIR__ . '/../../../preload.php')) {
+        if (\file_exists(__DIR__ . '/../../../vendor/scoper-autoload.php')) {
+            require_once __DIR__ . '/../../../vendor/scoper-autoload.php';
+        } elseif (file_exists(__DIR__ . '/../../../preload.php')) {
             if (file_exists(__DIR__ . '/../../../vendor')) {
                 require_once __DIR__ . '/../../../preload.php';
                 // test case in rector split package
@@ -69,9 +71,5 @@ private function includePreloadFilesAndScoperAutoload(): void
                 require_once __DIR__ . '/../../../preload-split-package.php';
             }
         }
-
-        if (\file_exists(__DIR__ . '/../../../vendor/scoper-autoload.php')) {
-            require_once __DIR__ . '/../../../vendor/scoper-autoload.php';
-        }
     }
 }