0 0 0 / 0)`);
    test_valid_value(`color`, `oklch(from oklch(0.7 0.45 30) 0 0 0deg / 0)`, `oklch(0 0 0 / 0)`);
    test_valid_value(`color`, `oklch(from oklch(0.7 0.45 30) 0 c h / alpha)`, `oklch(0 0.45 30)`);
    test_valid_value(`color`, `oklch(from oklch(0.7 0.45 30) l 0 h / alpha)`, `oklch(0.7 0 30)`);
    test_valid_value(`color`, `oklch(from oklch(0.7 0.45 30) l c 0 / alpha)`, `oklch(0.7 0.45 0)`);
    test_valid_value(`color`, `oklch(from oklch(0.7 0.45 30) l c 0deg / alpha)`, `oklch(0.7 0.45 0)`);
