robolectric runOnUiThread on a Thread does NOT work

runOnUiThread() does not seem to work when being executed within a thread. Anybody knows of a workaround?

Note: I filed a ticket here - http://ift.tt/25x4uPk

import android.app.Activity;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricGradleTestRunner;
import org.robolectric.annotation.Config;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;

import static org.junit.Assert.assertTrue;

@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, sdk = 21)
public class RunOnUiThreadTest {

    /**
     * Works
     * @throws Exception
     */
    @Test
    public void inside_the_main_thread() throws Exception {
        final Activity activity = Robolectric.setupActivity(Activity.class);
        final CountDownLatch latch = new CountDownLatch(1);
        final AtomicBoolean didRun = new AtomicBoolean(false);

        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                didRun.set(true);
                latch.countDown();
            }
        });

        latch.await(20, TimeUnit.SECONDS);
        assertTrue(didRun.get());
    }

    /**
     * Fails
     * @throws Exception
     */
    @Test
    public void inside_a_new_thread() throws Exception {
        final Activity activity = Robolectric.setupActivity(Activity.class);
        final CountDownLatch latch = new CountDownLatch(1);
        final AtomicBoolean didRun = new AtomicBoolean(false);

        Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
                activity.runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        didRun.set(true);
                        latch.countDown();
                    }
                });
            }
        });
        thread.start();

        latch.await(20, TimeUnit.SECONDS);
        assertTrue(didRun.get());
    }

}