message: Fix test on node 4.
diff: @@ -19,8 +19,9 @@ const runJestMock = jest.fn();
  jest.mock('jest-util', () => ({clearLine: () => {}}));
  jest.doMock('chalk', () => new chalk.constructor({enabled: false}));
  jest.doMock('../constants', () => ({CLEAR: '', KEYS}));
  -jest.doMock('../runJest', () => (...args) => {
  - runJestMock(...args);
  +jest.doMock('../runJest', () => function() {
  + const args = Array.from(arguments);
  + runJestMock.apply(null, args);
  // Call the callback
  args[args.length - 1]({snapshot: {}});
  