For Scenario where jest setup is not present in current React Project and you want to use a babel config unrelated to current setup, you can do the following setup.
jest.config.js
module.exports = {
verbose: true,
transform: { '^.+\\.js$': '<rootDir>/jestPreprocess.js' },
};
jest.preprocessor.js
const babelOptions = { presets: ['env'] }; // Place you .babelrc related config here
module.exports = require('babel-jest').createTransformer(babelOptions);
NOTE: When using babel-jest < 27, you must omit the .default part: require("babel-jest").createTransformer({ ....
package.json
"scripts": {
"test": "jest --config jest.config.js --no-cache",
// ...
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