Abstract: A field pressure test control system is adapted to be coupled to high pressure tubing through which fluid is pumped to a wellhead. When the system is coupled to the tubing and an isolation valve is open, the tubing is in fluid communication with a fluid line via at least the isolation valve. A sensor detects pressure in the fluid line during pressure testing of the high pressure tubing, and a relief valve is opened to permit fluid flow through the relief valve and thus lower pressure in the high pressure tubing. A pressure testing method includes closing the wellhead, and pumping fluid into the high pressure tubing and the fluid line. A fluid pressure in the fluid line is detected, and a relief valve is remotely opened to lower the fluid pressure. In several exemplary embodiments, the pressure testing is completed before a hydraulic fracturing operation begins.