diff --git a/admin/tool/health/index.php b/admin/tool/health/index.php
index bb63e3c9f1f..cc178309ce7 100644
--- a/admin/tool/health/index.php
+++ b/admin/tool/health/index.php
@@ -25,13 +25,7 @@
 
     ob_start(); //for whitespace test
     require('../../../config.php');
-
-    // extra whitespace test - intentionally breaks cookieless mode
-    $extraws = '';
-    while (ob_get_level()) {
-        $extraws .= ob_get_contents();
-        ob_end_clean();
-    }
+    $extraws = ob_get_clean();
 
     require_once($CFG->libdir.'/adminlib.php');