Testament was a planet located somewhere in the space of the galaxy's Alpha Quadrant, in orbit of the Sigma Cygni 57 star system, at coordinates 5.81N 0.31E.

In the 23rd century, Testament was home to a Federation colony, a noted center of mining and trade. By reference stardate 2/2306.01, the world had a population of 4.25 billion individuals of varied races and cultures, and the government was a full-status colonial member of the Federation. (FASA RPG module: The Federation)