diff --git a/smoketests/configForm.php b/smoketests/configForm.php
index 63385dc7..6d980dde 100644
--- a/smoketests/configForm.php
+++ b/smoketests/configForm.php
@@ -70,7 +70,7 @@ echo $printer->render($config);
 </form>
 <pre>
 <?php
-print_r($config->getAll());
+echo htmlspecialchars(print_r($config->getAll(), true));
 ?>
 </pre>
 </body>