An environmentally-friendly test port mounting in a conventional gasoline/diesel fuel dispenser cabinet to provide a technician access to the fuel line and perform various tests that enables testing to occur at a highline point in the line system. The technician may access the test port while the line system head pressure s maintained at a point above ground. The test port has a quick connect/disconnect fitting disposed in a collar intermediate a mounting for a filter in a conventional gasoline/diesel fuel dispenser and the filter to provide a technician access to the fuel line and perform various tests. The quick connect/disconnect fitting may also be coupled to a hose for draining fuel under pressure into a safety can to prevent spillage during replacement of the filter. The safety can may be emptied into the fuel tank to conserve the fuel, prevent polluting the environment and as a safety measure.