The Testament of Isaac is a work now regarded as part of the Old Testament apocrypha.

This has enabled modern scholars to determine how much of various fragmentary texts from the New Testament apocrypha and Old Testament apocrypha remain missing.

Like many other Testament of ... works in the Old Testament apocrypha, it gives the narrative a framing-tale of Job's last illness, in which he calls together his sons and daughters to give them his final instructions and exhortations.