The Xilinx FPGA Test Patterns by Polybus facilitate extensive testing for Xilinx FPGAs, enhancing the detection of defects and bolstering system reliability. This customizable suite includes over 400 test patterns designed to evaluate both the internal functionality and the extensive interconnects of FPGAs, far surpassing traditional manufacturer tests in coverage. By running these tests in-system, users can ensure the future upgradeability and robustness of their FPGA installations, minimizing the risk associated with field upgrades and handling defects.