puppetlabs/puppet-acceptance — pull request #122 by cprice-puppet (2012-01-24 20:23:08+00:00)
Title: Allow ValidateSignCert to pass in a single-node setup

In the case where you are running acceptance tests against a single node (which is serving as both master and agent), the puppet cert --sign-all needs to accept an exit code of 24 (which means that there were no certs to sign).