Test Dummy

From Pluralpedia, the collaborative plurality dictionary
test dummy ( n.)
The yellow in the flag has two symbolisms. While paired with black it represents the caution and planning that goes into testing, but while paired with orange it symbolizes enthusiasm and dedication to the cause. The white stands for discovery.
Applies toheadmates
CoinerHenry of the Happy Little Accidents

A Test dummy is a headmate who works with technicians to help figure out system functions through aiding in experimentation. For example, if a technician wants to know more about how fronting and switching work, they may ask to observe a test dummy.