I take it you’re talking about the Old Covenant, not exactly the collection of books properly known as the Old Testament. Is that right?
If I understand your question correctly, the Old Covenant has been replaced with something better.
Hebrews 8:6
6But in fact the ministry Jesus has received is as superior to theirs as the covenant of which he is mediator is superior to the old one, since the new covenant is established on better promises.
Hebrews 10:8-10
8First he said, “Sacrifices and offerings, burnt offerings and sin offerings you did not desire, nor were you pleased with them”—though they were offered in accordance with the law.
9Then he said, “Here I am, I have come to do your will.” He sets aside the first to establish the second.
10And by that will, we have been made holy through the sacrifice of the body of Jesus Christ once for all.