diff --git a/tests/cases/05-smtp.inc b/tests/cases/05-smtp.inc
index 52a0620..94a46ae 100644
--- a/tests/cases/05-smtp.inc
+++ b/tests/cases/05-smtp.inc
@@ -25,6 +25,8 @@
    test_retrieved_messages_are_the_same "piler1" "piler"
 
    run_05_sphinx_tests
+
+   docker exec "piler1" su piler -c 'php /usr/libexec/piler/sign.php --webui /var/piler/www --mode time'
 }