diff --git a/packages/php/email-editor/tests/unit/_bootstrap.php b/packages/php/email-editor/tests/unit/_bootstrap.php
index 317fcb1606..bb49825b75 100644
--- a/packages/php/email-editor/tests/unit/_bootstrap.php
+++ b/packages/php/email-editor/tests/unit/_bootstrap.php
@@ -7,6 +7,8 @@
 
 declare(strict_types = 1);
 
+require_once __DIR__ . '/../../vendor/autoload.php';
+
 $console = new \Codeception\Lib\Console\Output( array() );
 
 if ( ! function_exists( 'esc_attr' ) ) {