diff --git a/Testing.md b/Testing.md
index 1c3b675..190cc9a 100644
--- a/Testing.md
+++ b/Testing.md
@@ -193,7 +193,7 @@ Once all tests finished, open `index.html` in `coverage/lcov-report` directory t
 If the source code that you developed is all covered by your test scripts, it is ok to send a pull request.
 
 ### Testing editor
-Currently, there is only a few test scripts for Node-RED editor. To run a UI test scripts:
+To run a UI test scripts, you need to install chrome browser first. After you install it, run the command:
 ```
     grunt test-ui
 ```