IdlingResources doesn't work Espresso Android

I have the problem with idling resources while testing using Espresso.

It doesn't work. It is called only twice and that's all, even if return false.

public class MyIdlingResource implements IdlingResource {

    private boolean mIdle;
    private ResourceCallback mResourceCallback;

    public MyIdlingResource () {
        this.mIdle = false;
        this.mResourceCallback = null;
    }

    @Override
    public final String getName() {
        return ViewAvailabilityClassIdlingResource.class.getSimpleName();
    }

    @Override
    public final boolean isIdleNow() {
        ArrayList<View> views = doStuff();
        mIdle =  views != null && !views.isEmpty();

        if (mIdle) {
            if (mResourceCallback != null) {
                mResourceCallback.onTransitionToIdle();
            }
        }

        return false;
    }

    @Override
    public void registerIdleTransitionCallback(ResourceCallback resourceCallback) {
        mResourceCallback = resourceCallback;
    }

}

So in this case I return false all the time, but it doesn't work either.

What is wrong ?