I really wish you wouldn't use the terms "New" and "Old" Testament, but instead use "Hebrew Bible" and "Christian Bible".

In our culture, everything "New" is better, and indeed some Christian ideologs maintain that their religion is the "perfection" of ours, in the "Old" Testament.

Consider also that "Testament" comes from a Latin word meaning to place your hands on your, uh, testicles, as the most convincing way of swearing an oath.

So forget the "Old" and "New" Testaments, and just refer to the two holy books for what they are: The Hebrew Bible and the Christian Bible.