diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 85116d225d..5a355352d7 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -115,7 +115,7 @@ Pull requests often need some real-world testing.
 
 2. Run `npm install`.
 
-3. Go to the `webpack-dev-server` module (`cd node_modules/webpack-dev-server`), and run `npm run prepublish`.
+3. Go to the `webpack-dev-server` module (`cd node_modules/webpack-dev-server`), and run `npm run build`.
 
 The pull request is now ready to be tested.