blockingCallable.stop();
    executor.shutdown();
    assertThat(executor.awaitTermination(10, SECONDS)).isTrue();
    assertThat(getDone(future2)).isFalse();
  }

  public void testSecondTaskWaitsForFirstEvenIfCancelled() throws Exception {
    BlockingCallable blockingCallable = new BlockingCallable();
    ListenableFuture<@Nullable Void> future1 = serializer.submit(blockingCallable, executor);