diff --git a/tox.ini b/tox.ini
index adddba8..7a89a47 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,3 +25,6 @@
 
 [testenv:venv]
 commands = {posargs}
+
+[testenv:validate-layout]
+commands = zuul-server -c etc/zuul.conf-sample -t -l {posargs}