diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7b7060fdc..f0935656a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -22,12 +22,18 @@ $ npm run watch
 
 to have Babel build itself then incrementally build files on change.
 
-To run tests:
+To run all tests:
 
 ```sh
 $ npm test
 ```
 
+or run tests for a specific package:
+
+```sh
+$  npm test packages/babel-preset-babili
+```
+
 To run lint:
 
 ```sh