RxJava2: TestSubscriber.AssertNoErrors always pass

I am testing some features of Rxjava2(2.0.7) and have some troubles in unit test

here is my code

    RxJavaPlugins.setErrorHandler(null);
    Observable<String> o = Observable.create((ObservableOnSubscribe<String>) e -> {
        String s = System.currentTimeMillis() + "";
        System.out.println("runing observable@" + s);
        throw new RuntimeException();
    }).delay(1, TimeUnit.SECONDS);

    o
            .doOnNext(x -> {
                System.out.println(x);
                throw new RuntimeException();
            })
            .doOnError(e->e.printStackTrace())
            .test()
            .assertNoErrors()
            .awaitCount(1)
            .awaitDone(5, TimeUnit.SECONDS);

The problem is this test always passed, but I can still find exception printed in log

What am I doing wrong?