I am using Codio for my Meteor development, so my app is not hosted at localhost:3000 when I'm previewing it, it's actually at random-name.codio.io:3000, which I have to get to by visiting random-name-3000.codio.io, so when Velocity fires up its iframe to run client-side tests on it has the wrong address, like so: <iframe src="http://localhost:5000/?mocha=true&lastModified=1427105608181">.
How do I convince Velocity to use random-name-5000.codio.io as its src instead of localhost:5000?