Expo-Constants failing Jest since swap to app.config.json - react-native

Question

As stated in the title, I've recently switched our project from app.json to app.config.json ready for EAS builds in Expo. Since then, my simple App.test.js has been failing
TypeError: Cannot read property 'environment' of undefined
const enableInExpoDevelopment = Constants.manifest.extra.environment !== 'Development'
This is the App.test.js
import React from 'react';
import renderer from 'react-test-renderer';
import App from '../App';
describe('<App />', () => {
it('has 1 child', () => {
const tree = renderer.create(<App />).toJSON();
expect(tree.children.length).toBe(1);
});
});
And this is the current jest.config.js
module.exports = {
preset: 'jest-expo',
transform: {
'^.+\\.js$': require.resolve('react-native/jest/preprocessor.js')
},
transformIgnorePatterns: [
'node_modules/(?!(jest-)?react-native|react-clone-referenced-
element|#react-native-community|expo(nent)?|#expo(nent)?/.*|react-
navigation|#react-navigation/.*|#unimodules/.*|unimodules|sentry-
expo|native-base|#sentry/.*)'
],
reporters: [
'default'
],
setupFiles: [
'./__mocks__/#react-native-async-storage/async-storage.js'
]
}