A method for testing an optical network is disclosed. The method includes transmitting a first optical power level on a first optical port of an optical assembly, where the optical assembly includes the first optical port, an optical cable and/or an optical waveguide, and a second optical port. The optical assembly is installed in an assembled computer and the assembled computer is in a state suitable for an end user. The method includes measuring a second optical power level at the second optical port and determining a quality level by determining if the second optical power level is below a quality threshold value. The transmitting, the measuring, and the determining occur within the assembled computer. An apparatus and computer program product also perform the functions of the method.