title: Test Uncaught Error: macroTask 'setInterval': can not transition to 'running', expecting state 'scheduled', was 'notScheduled'
body: <p>I am using Angular version "4.2.2", Angular Cli version "1.1.1" and zone.js 0.8.12. Some of my unit tests that used to work either in Chrome and PhanthomJS are now failing with the following error:</p>
  
  <p>ERROR
  Uncaught Error: macroTask 'setInterval': can not transition to 'running', expecting state 'scheduled', was 'notScheduled'.</p>
  
  <p>Anyone has seen these errors before and know how to fix them?</p>