Can the terms of a testamentary trust be kept confidential?

As with the rest of the contents of a will, the terms of a testamentary trust can be kept confidential. However, if the maker of the will dies and someone then takes the will to court to get an order allowing the executor to execute the provisions of the will, then the will becomes a public document. The contents of the will and the terms of any testamentary trusts therein will therefore also become public.