assertArrayEquals(new byte[] { 0x01, 0x02, 0x03, 0x04 }, requestBuffer);
    }

    @Test
    @DisplayName("getResponseRaw should return the same response buffer")
    void testGetResponseRaw() {
        // Verify getResponseRaw returns the exact same array instance
        byte[] responseBuffer = negotiation.getResponseRaw();
        assertSame(testResponseBuffer, responseBuffer);