The pixel detector is an integral part of the CMS silicon tracker, designed to measure the position and momentum of charged particles produced in high-energy collisions at the Large Hadron Collider (LHC). The phase 1 upgrade of the CMS forward pixel detector has replaced the previous forward pixel detector in early 2017. In this talk, I will discuss the testing and qualification procedures for the modules and half cylinders of the CMS Phase I FPIX detector. I will also present a model-independent search for the production of heavy resonances decaying into top-antitop quark pairs with CMS Run II data. The analysis focuses on the semi-leptonic channel and uses reconstruction techniques that are optimized for top quarks with high Lorentz boosts.