// Initially not expired
        assertFalse(auth.isExpired());

        // Set short TTL
        auth.setAuthenticationTTL(100); // 100 milliseconds
        assertEquals(100, auth.getAuthenticationTTL());

        // Still not expired immediately
        assertFalse(auth.isExpired());

        // Wait for expiration
        Thread.sleep(150);

        // Should be expired now