systemHelper.setSystemCpuCheckInterval(10L);
        systemHelper.waitForNoWaitingThreads();
        assertEquals(0, systemHelper.waitingThreadNames.size());
    }

    @Test
    public void test_addUpdateConfigListener_withException() {
        systemHelper.addUpdateConfigListener("TestError", () -> {
            throw new RuntimeException("Test error");
        });
        final String result = systemHelper.updateConfiguration();