Test dial activity with espresso

I am trying to test a click on a button that sends the user to the Phone activity... Like this:

public void callNumber(String number){
        Uri numberUri = Uri.parse("tel:"+number);
        Intent callIntent = new Intent(Intent.ACTION_DIAL, numberUri);
        startActivity(callIntent);
}

Well... but when I run this test:

    @Test
    public void clickDialButtonTest(){
        onView(withId(R.id.help_viewpager)).perform(swipeLeft());
        onView(withId(R.id.help_viewpager)).perform(swipeLeft());

        onView(withId(R.id.phone_call_btn)).perform(click());
        intended(allOf(hasAction(Intent.ACTION_DIAL)));
    }

I get this:

Wanted to match 1 intents. Actually matched 0 intents.

I can see that the activity opens and I works fine when I am using the app... But in the espresso test it doesn't work.

I think that the problem is that espresso does't wait for the next activity to start before testing. But I don't know how to wait for it.

Any help is appreciated!