diff --git a/utils/compiler/src/PhpScoper/StaticEasyPrefixer.php b/utils/compiler/src/PhpScoper/StaticEasyPrefixer.php
index 15aba0f464d..6d28da182f6 100644
--- a/utils/compiler/src/PhpScoper/StaticEasyPrefixer.php
+++ b/utils/compiler/src/PhpScoper/StaticEasyPrefixer.php
@@ -19,6 +19,8 @@ final class StaticEasyPrefixer
         'Composer\InstalledVersions',
         // for SmartFileInfo
         'Symplify\SmartFileSystem\SmartFileInfo',
+        // for AbstractRectorTestCase
+        'Symplify\PackageBuilder\Testing\AbstractKernelTestCase',
     ];
 
     /**