}

    @Test
    public void testIsValidWithInvalidDialect() {
        SmbNegotiationRequest request = mock(SmbNegotiationRequest.class);
        // Use reflection to set private dialectIndex field
        setDialectIndex(response, 11);
        assertFalse(response.isValid(mockContext, request));
    }

    @Test
    public void testToString() {
        response.getServerData().securityMode = 1;