old_contents: module.exports = {
    rootDir: __dirname,
    setupFilesAfterEnv: ['<rootDir>/test/unit.setup.js'],
    modulePathIgnorePatterns: ['.cache'],
    testMatch: ['/**/__tests__/**/*.[jt]s?(x)'],
  };
  
new_contents: module.exports = {
    rootDir: __dirname,
    setupFilesAfterEnv: ['<rootDir>/test/unit.setup.js'],
    modulePathIgnorePatterns: ['.cache'],
    testMatch: ['/**/__tests__/**/*.[jt]s?(x)'],
    watchPathIgnorePatterns: ['<rootDir>/.*\\.json'],
  };
  
subject: Make jest does not watch .json file in the --watch mode