diff --git a/manifests/site.pp b/manifests/site.pp
index 246d8f3ad0..a883f52baf 100644
--- a/manifests/site.pp
+++ b/manifests/site.pp
@@ -514,6 +514,7 @@ node /^logstash-worker\d+\.openstack\.org$/ {
 }
 
 # Node-OS: trusty
+# Node-OS: xenial
 node /^subunit-worker\d+\.openstack\.org$/ {
   $group = "subunit-worker"
   class { 'openstack_project::server':