README.md in github-ds-0.2.8 vs README.md in github-ds-0.2.9

- old
+ new
@@ -189,9 +189,11 @@
 
 ## Development
 
 After checking out the repo, run `script/bootstrap` to install dependencies. Then, run `script/test` to run the tests. You can also run `script/console` for an interactive prompt that will allow you to experiment.
 
+**Note**: You will need a MySQL database with no password set for the root user for the tests. Running `docker-compose up` will boot just that. This functionality is not currently used by GitHub and was from a contributor, so please let us know if it does not work or gets out of date (pull request is best, but an issue will do).
+
 To install this gem onto your local machine, run `script/install`. To release a new version, update the version number in `version.rb`, commit, and then run `script/release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
 
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/github/github-ds. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct. We recommend reading the [contributing guide](./CONTRIBUTING.md) as well.