We're currently using Travis (https://travis-ci.org/wikimedia/restbase) to run our tests. While this is convenient, it is really slow and is starting to cause a backlog of pull requests that must wait for a test box to become available for testing.
Let's investigate moving this to our own hardware (e.g. an existing Jenkins infrastructure, or roll our own Travis cluster) so that we can allocate test boxes readily/on-demand.