});
    }

    /**
     * Test concurrent access to getPreauthIntegrityHash
     */
    @Test
    @DisplayName("Concurrent getPreauthIntegrityHash should be safe")
    void testConcurrentGetPreauthHash() throws Exception {
        int threadCount = 20;
        CountDownLatch startLatch = new CountDownLatch(1);
        CountDownLatch doneLatch = new CountDownLatch(threadCount);