John Duns Scotus seems to have thought not quite:
... one important fact about propositions that are self-evident and analytically true is that God himself can’t make them false. They are necessary truths. So the natural law in the strict sense does not depend on God’s will. This means that even if (as I believe) Scotus is some sort of divine-command theorist, he is not whole-hog in his divine command theory. Some moral truths are necessary truths, and even God can’t change those. They would be true no matter what God willed.
... even the first three commandments, once we start looking at them, are not obviously part of the natural law in the strict sense. In particular, the third commandment, the one about the Sabbath day, is a little tricky. Obviously, the proposition “God is to be worshiped on Saturday” is not self-evident or analytic. In fact, Scotus says it’s not even true any more, since Christians are to worship on Sunday, not Saturday. So, Scotus asks, what about the proposition “God is to be worshiped at some time or other”? Even that is not self-evident or analytic. The best one can do is “God is not to be hated.” Now that’s self-evident and analytic, since by definition God is the being most worthy of love and there is nothing in him worthy of hate. But obviously that’s far weaker than any positive commandment about whether and when we should worship God.
So by the time Scotus completes his analysis, we are left with nothing in the natural law in the strict sense except for negative propositions: God is not to be hated, no other gods are to be worshiped, no irreverence is to be done to God. Everything else in the Decalogue belongs to the natural law in a weaker or looser sense.