diff --git a/docs/testsite.rst b/docs/testsite.rst
index dc0ecd1f18a54fad2ba9417af57ef9a6f189a82b..118141214c87a4b96a9860167d3c89a95b7a3ff0 100644
--- a/docs/testsite.rst
+++ b/docs/testsite.rst
@@ -125,7 +125,7 @@ In order to deploy the test site, the following steps would normally be taken:
 
    .. code-block:: shell
 
-      ssh-keyscan mail.example.com ldap.example.com xmpp.example.com web.example.com
+      ssh-keyscan mail.example.com ldap.example.com xmpp.example.com web.example.com $(resolveip -s mail.example.com) $(resolveip -s ldap.example.com) $(resolveip -s xmpp.example.com) $(resolveip -s web.example.com)
 
 9. Invoke the ``bootstrap.yml`` playbook in order to set-up some basic
    environment for Ansible runs on all servers: