assertEquals((byte) 0xFF, dst[2]);
        assertEquals((byte) 0xFF, dst[3]);
    }

    @Test
    @DisplayName("Test writeUTime with DST scenarios")
    void testWriteUTimeWithDST() {
        when(mockConfig.getLocalTimezone()).thenReturn(mockTimeZone);

        byte[] dst = new byte[4];
        long testTime = System.currentTimeMillis();