Just had ours and passed no probs. Beforehand we cleared all our junk (stool, coats, basket with chains and windlasses in etc.) away from the engine boards so he had easy access, tested the smoke & CO alarms, and just generally made sure that nothing would be in the way.
Our extinguishers i think are out of date, but gauges all in the green. We give them a good shake now and then.
We just had a new manual changeover valve & tails fitted last month by a gas safe chap, the new valve has a test point on it so not bothered with a bubble tester, maybe look at yours and see if it's the same?