runnableThrowing(exception), DELAY_MS, MILLISECONDS));
    assertThat(e).hasCauseThat().isEqualTo(exception);
  }

  private static <T> Callable<T> callableThrowing(Exception exception) {
    return () -> {
      throw exception;
    };
  }

  private static Runnable runnableThrowing(RuntimeException e) {
    return () -> {
      throw e;
    };