diff --git a/contrib/dnsmasq/metal0.conf b/contrib/dnsmasq/metal0.conf
index 283ca6ea..8632ac6a 100644
--- a/contrib/dnsmasq/metal0.conf
+++ b/contrib/dnsmasq/metal0.conf
@@ -22,3 +22,7 @@ address=/node1.example.com/172.18.0.21
 address=/node2.example.com/172.18.0.22
 address=/node3.example.com/172.18.0.23
 address=/cluster.example.com/172.18.0.21
+
+# for a Tectonic test, ignore
+address=/tectonic.example.com/172.18.0.22
+address=/tectonic.example.com/172.18.0.23