Simpler, more accurate test file

docs-next/src/content/docs/getting-started.mdx

@@ -17,7 +17,7 @@ As of v10.0.0, Mocha requires [Node.js](https://nodejs.org) v14.0.0 or newer.
 
 ## 2. Test File
 
-Create the following `example.test.js` file anywhere in your project's source code, such as in a new `test/` directory:
+Create the following `example.test.js` file under a `test/` directory:
 
 ```js
 // test/example.test.js