A random question maybe, but does PAT testing apply to things that aren't mains powered?  

I'm currently looking at buying assorted bits of PA gear.  Signal processors are often powered by a wall wart power supply.  Last time I had to get band gear tested, the power supply would get tested and have a sticker put on it and the actual device didn't as its only 9v.  That was 10+ years ago though, and I get that rules change now and then.  But I'm seeing passive speakers, microphones and even mic stands being advertised as "just been pat tested"
Am I going mad, or are they?