diff --git a/doc-src/content/help/tutorials/contributing.markdown b/doc-src/content/help/tutorials/contributing.markdown
index 5894bea5..1ca15cc1 100644
--- a/doc-src/content/help/tutorials/contributing.markdown
+++ b/doc-src/content/help/tutorials/contributing.markdown
@@ -278,15 +278,28 @@ Getting recent changes from the main repo:
Running Tests
-1. Install development dependencies:
+1. You must have Ruby installed on your system. After [setting up git](#setting-up-git),
+ change to the root directory of your git checkout of Compass.
+
+ cd compass
+
+2. Install the bundler Ruby gem.
+
+ gem install bundler
+
+ If installing to your system gems, you'll probably need to add `sudo` to the
+ front of that command. If you don't know what that means, you probably need
+ to add `sudo` to the front.
+
+3. Install development dependencies:
bundle install --binstubs devbin
-2. Running core library and stylesheet tests:
+4. Running core library and stylesheet tests:
- rake run_tests
+ bundle exec rake test features
-3. Running behavior tests
+5. Running behavior tests
./devbin/cucumber