diff --git a/scoper.inc.php b/scoper.inc.php
index ffab50e8..91b8b402 100644
--- a/scoper.inc.php
+++ b/scoper.inc.php
@@ -66,7 +66,7 @@
     'exclude-classes' => array_merge($wp_classes, [
         'WooCommerce',
         '/^WC_/',
-        '^WCS_Retry_Manager'
+        '\WCS_Retry_Manager'
     ]),     // list<string|regex>
     'exclude-functions' => array_merge($wp_functions, [
         '/^wc/',