Adding the Test Suite <script tags> to a create-react-app template

I am trying to start the first project to get the Front End Libraries certification and I can’t manage to embed the [ ] in the code. I have tried in the Index.html, I added a package called ScriptTag and finally I added a package called Helmet. none of them could actually embed the test suite in the page. Any idea on how to do it on create-react-app template. Do I need to build the react app from scratch?