@Override
                public void uncaughtException(Thread thread, Throwable e) {
                  thrownByExecutionThread = e;
                }
              });
          executionThread.start();
        }
      };

  @Override
  protected final void tearDown() {
    tearDownStack.runTearDown();
    assertNull(
        "exceptions should not be propagated to uncaught exception handlers",

                @Override
                public void uncaughtException(Thread thread, Throwable e) {
                  thrownByExecutionThread = e;
                }
              });
          executionThread.start();
        }
      };

  @Override
  protected final void tearDown() {
    tearDownStack.runTearDown();
    assertNull(
        "exceptions should not be propagated to uncaught exception handlers",