How to solve TypeError: environment.teardown is not a function

Question

I can\'t test an application which was created with create-react-app.

All guides says that test is working by default, but when I try "yarn test", it requir

Answer 1

You shouldn't need to install jest-cli yourself. It should come out of the box.

Try the following:

1. Delete package-lock.json, yarn.lock and node_modules
2. Remove jest from the dependencies in package.json
3. Then do npm install or yarn install.