} else if (logger.isDebugEnabled()) {
                    logger.debug("No KeyMatch boost docs");
                }

                waitForNext();
            } catch (final Exception e) {
                logger.warn("Failed to load KeyMatch: id={}, term={}", keyMatch.getId(), keyMatch.getTerm(), e);
            }
        });

    @Test
    public void test_waitForNext_withPositiveInterval() throws InterruptedException {
        configHelper.setReloadInterval(20L);

        long startTime = System.currentTimeMillis();
        configHelper.waitForNext();
        long endTime = System.currentTimeMillis();

        long elapsed = endTime - startTime;
        assertTrue("Expected at least 15ms sleep, got " + elapsed + "ms", elapsed >= 15);