thoughtbot/cocaine — comment on commit 4eb18d2527676ce849f89410f85dfa1ac691c31c
File:  line 0
By michaelklishin:

It is your (team) choice. Most people don't test against ruby-head but I'd not say it is uncommon to do so. There are usually no issues with it unless something really has changed in the core library, standard library and so on. For a relatively small library like Cocaine that does not have dozens of dependencies or native parts, testing against ruby-head probably will be a breeze. Try it ;)