Over half of all first-time satellites from university nanosatellite projects fail. Many of these failures could have been avoided with enhanced testing capabilities. To this end, Portland State Aerospace Society (PSAS) built an open-source hardware in the loop system integration test jig to help student groups thoroughly test their designs. In this project, the Helmholtz cage, RF test environment, and solar simulator were upgraded. The upgrades to the Helmholtz cage allowed us to determine the local magnetic field, zero it out, and set the field to a specified value determined by the simulation software. The solar simulator’s printed circuit board, or PCB, underwent a complete redesign and upgrade, allowing us to incorporate higher quality LEDs to better simulate the natural light spectrum, utilize simpler hardware, and fix bugs present in the previous system. Finally, the RF test environment now allows us to inject noise into the system, providing a more accurate environmental simulation. All of these upgrades are vital to testing the Attitude Control and Determination System (ACDS), power system, and RF subsystems in the OreSat environment and ensuring a successful mission.