diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9084d99db3a..a0f9ce2d0da 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -36,7 +36,7 @@ We welcome pull requests with fixes and improvements to GitLab code, tests, and/
 
 ### Pull request guidelines
 
-If you can, please submit a pull request with the fix or improvements including tests. If you don't know how to fix the issue but can write a test that exposes the issue we will accept that as well. The workflow to make a pull request is as follows:
+If you can, please submit a pull request with the fix or improvements including tests. If you don't know how to fix the issue but can write a test that exposes the issue we will accept that as well. In general bug fixes that include a regression test are merged quickly while new features without proper tests are least likely to receive timely feedback. The workflow to make a pull request is as follows:
 
 1. Fork the project on GitHub
 1. Create a feature branch
@@ -51,10 +51,11 @@ We will accept pull requests if:
 * The code has proper tests and all tests pass (or it is a test exposing a failure in existing code)
 * It can be merged without problems (if not please use: `git rebase master`)
 * It doesn't break any existing functionality
-* It's quality code that conforms to the [Rails style guide](https://github.com/bbatsov/rails-style-guide) and best practices
+* It's quality code that conforms to the [Ruby](https://github.com/bbatsov/ruby-style-guide) and [Rails](https://github.com/bbatsov/rails-style-guide) style guides and best practices
 * The description includes a motive for your change and the method you used to achieve it
 * It keeps the GitLab code base clean and well structured
 * We think other users will benefit from the same functionality
 * If it makes changes to the UI the pull request should include screenshots
+* It is a single commit (please use git rebase -i to squash commits)
 
 For examples of feedback on pull requests please look at already [closed pull requests](https://github.com/gitlabhq/gitlabhq/pulls?direction=desc&page=1&sort=created&state=closed).