Use a Jest config file

craco.config.js

module.exports = {
  jest: {
    configure: {
      globals: {
        CONFIG: true,
      },
    },
  },
};

jest.config.js

const { createJestConfig } = require('@craco/craco');

const cracoConfig = require('./craco.config.js');
const jestConfig = createJestConfig(cracoConfig);

module.exports = jestConfig;