Why does shallow Rendering not work as expected?

I have the same problem. It solved by using the below . I have created a jest.config.js file at the root level and add below code. module.export ={ setupFiles:[ '/src/setUpTests.js'] } I have created setUpTests.js file and add below code. import { configure } from 'enzyme'; import Adapter from 'enzyme-adapter-react-16'; configure({ adapter: new Adapter() }); And solved my problem.