I had my basement finished by a renovator in the fall, overall he did a good job, though I'm planning to put in a new outlet so I started testing the circuits in my basement with a plug tester. I've located the last outlet in the circuit, though I'm finding that it has an open ground. The outlet before that one in the circuit has a good connection to ground, so I know the problem lies somewhere between those two points. All the wiring is 14-2 Romex, and the copper ground wire appears to have good contact in the outlets. Any advice?