From b07341a1f7de4dc4c8d5b43f79a2e5f35afd23a0 Mon Sep 17 00:00:00 2001
From: Brian Donovan <donovan@squareup.com>
Date: Mon, 16 Mar 2015 08:45:05 -0700
Subject: [PATCH] Add a note about using the `--grep` option to focus test
 runs.

---
 CONTRIBUTING.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a77bfaceab..615a5bf423 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -40,6 +40,12 @@ running them with `mocha`:
 $ mocha test/transformation.js
 ```
 
+Use mocha's `--grep` option to run a subset of tests by name:
+
+```sh
+$ mocha test/transformation.js --grep es7
+```
+
 #### Workflow
 
 * Fork the repository