diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 10d8bf70af..dc41eb96bb 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -35,13 +35,13 @@ This is mostly overkill and you can limit the tests to a select few by directly
 running them with `mocha`:
 
 ```sh
-$ mocha test/transformation.js
+$ mocha test/core/transformation.js
 ```
 
 Use mocha's `--grep` option to run a subset of tests by name:
 
 ```sh
-$ mocha test/transformation.js --grep es7
+$ mocha test/core/transformation.js --grep es7
 ```
 
 #### Workflow