}

        @Test
        @DisplayName("Test extended security property")
        void testExtendedSecurityProperty() {
            assertFalse(testBlock.isExtendedSecurity());
            testBlock.setExtendedSecurity(true);
            assertTrue(testBlock.isExtendedSecurity());
        }

        @Test
        @DisplayName("Test expiration property")
        void testExpirationProperty() {