diff --git a/setup/lib/form_processing.lib.php b/setup/lib/form_processing.lib.php
index 65ebb1db2e..32b2a1d0ea 100644
--- a/setup/lib/form_processing.lib.php
+++ b/setup/lib/form_processing.lib.php
@@ -56,9 +56,9 @@ function process_formset(FormDisplay $form_display)
             <?php
         } else {
             // drop post data
-            header('HTTP/1.1 303 See Other');
-            header('Location: index.php');
             if (!defined('TESTSUITE')) {
+                header('HTTP/1.1 303 See Other');
+                header('Location: index.php');
                 exit;
             }
         }