Espresso:No views in hierarchy found matching with id: android:id/home

When i run my test case,I got follow exception . android.support.test.espresso.NoMatchingViewException: No views in hierarchy found matching: with id: android:id/home This is my TestCase code. ``` public void nav_to_alarm_test(){ onView(withId(R.id.navigation_notifications)).perform(click()); onView(withId(R.id.rl_reminder)).perform(click()); onView(withId(R.id.item_test)).perform(click()); onView(withId(android.R.id.home)).perform(click());//throw exception here onView(withId(android.R.id.home)).perform(click()); } ``` This is android.R.id.home,belongs to button provided by ActionBar ``` @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: finish(); return true; case R.id.item_test: startActivityForResult(CreateOrUpdateReminderActivity.class,CMD_ADD_REMINDER); return true; default: return super.onOptionsItemSelected(item); } } ``` why can't find views in hierarchy for resource id android.R.id.home? I have Google my problem, but answers isn't what i want. Thanks for any help.