I am trying to use this package to get jsdom@12 into our test environment for shadow testing, since this is not supported in 11 and below.

I have installed this package, and it's showing up in my node_modules. However, if I set the following in my jest.config.js:

testEnvironment: 'jest-environment-jsdom-twelve',

I get the following error when trying to run tests:

● Validation Error:

  Test environment jest-environment-jsdom-twelve cannot be found. Make sure the testEnvironment configuration option points to an existing node module.

  Configuration Documentation:
  https://jestjs.io/docs/configuration.html

I have also tried using jsdom-twelve, since Jest uses jsdom as their default and their package is called jest-environment-jsdom. Still no luck.

Environment:

node v10.15.1
npm v6.8.0
jest v24.1.0