diff --git a/modules/simpletest/drupal_web_test_case.php b/modules/simpletest/drupal_web_test_case.php
index 251c5c1..e2934be 100644
--- a/modules/simpletest/drupal_web_test_case.php
+++ b/modules/simpletest/drupal_web_test_case.php
@@ -1230,7 +1230,7 @@ class DrupalWebTestCase extends DrupalTestCase {
    */
   protected function drupalGetToken($value = '') {
     $private_key = drupal_get_private_key();
-    return drupal_hmac_base64($value, $this->session_id . $private_key);
+    return drupal_hmac_base64($value, $this->session_id . $private_key . drupal_get_hash_salt());
   }
 
   /*