diff --git a/classes/local/block_verify_certs/certificates/base.php b/classes/local/block_verify_certs/certificates/base.php
index a09065a..4e250d3 100644
--- a/classes/local/block_verify_certs/certificates/base.php
+++ b/classes/local/block_verify_certs/certificates/base.php
@@ -20,6 +20,7 @@
 use admin_settingpage;
 use admin_setting_configcheckbox;
 use lang_string;
+use ReflectionClass;
 
 /**
  * Base class for certificates.
@@ -60,7 +61,9 @@ public function get_fullname(): string {
      * @return string
      */
     final public function get_shortname(): string {
-        return str_replace(__NAMESPACE__ . '\\', '', static::class);
+        $reflector = new ReflectionClass(static::class);
+
+        return $reflector->getShortName();
     }
 
     /**