Breaker in question: http://www.geindustrial.com/products/circuit-breakers/dual-function-circuit-interrupter-dfci
When I press the test button both LEDs blink continuously (blinking does not stop) and the breaker does not trip.
The manual does not mention anything anything about continuous blinking LEDs and GE support has been no help.
If I unplug my PC and surge protector from the circuit the test button does function normally, however I'm not sure why those devices would cause the test function to stop working.