That's a good idea. Did the tests pass without your changes?
I've added a few piecemeal tests over the years (all the .t files in the repo), and there's also some tests in my curated repo (http://github.com/akkartik/arc). All those seem ok..
Update 1 hour later: almost all rainbow tests pass! I had to disable the dfn tests, and the ssyntax tests at the bottom of core-evaluation-test were hanging. Other than that it's all good.
There's still a couple of syntax tests that are failing, likely because of test harness issues. And I'd like to unify all the different tests into a single framework. For future work..
---
Update 43 minutes later: it turns out rainbow's ssyntax precedence rules were different. Perhaps anarki changed at some point. Those tests are now fixed.