The Gundam F90 test unit is a mobile suit constructed by the SNRI, and ultimately captured by the Mars Zeon in the manga Mobile Suit Gundam F91: Formula Wars 0122.
The Gundam F90 was captured by the Mars Zeon near Side 4. After the Zeon captured it they repainted it in a distinctive red-orange-white colour scheme. However the Mars Zeon were not able to capture any of the specialized Mission packs that the unit could be mounted with, but they adapted the unit with additional thrusters that granted it additional speed. A trait common in Zeon tactics was to use hit and run style maneuvers while carrying out their missions, and it would only humiliate the Federation more since it was one of their suits carrying out the damage.