diff --git a/php-packages/testing/src/integration/Extend/OverrideExtensionManagerForTests.php b/php-packages/testing/src/integration/Extend/OverrideExtensionManagerForTests.php
index 3e1b988074..09f1b84392 100644
--- a/php-packages/testing/src/integration/Extend/OverrideExtensionManagerForTests.php
+++ b/php-packages/testing/src/integration/Extend/OverrideExtensionManagerForTests.php
@@ -32,15 +32,18 @@ public function extend(Container $container, ?Extension $extension = null): void
         $container->when(ExtensionManagerIncludeCurrent::class)->needs('$enabledIds')->give($this->extensions);
         if (count($this->extensions)) {
             $container->singleton(ExtensionManager::class, ExtensionManagerIncludeCurrent::class);
+            /** @var ExtensionManagerIncludeCurrent $extensionManager */
             $extensionManager = $container->make(ExtensionManager::class);
 
+            $extensionManager->booted = true;
+            $extensionManager->extend($container);
+
+            $extensionManager->booted = false;
             foreach ($this->extensions as $extension) {
                 $extensionManager->enable($extension);
             }
 
             $extensionManager->booted = true;
-
-            $extensionManager->extend($container);
         }
     }
 }