Yeah. It's a test. I have done that too before. Say something obviously wrong and see if you get called on it.
I wouldn't call you out. I'd quietly work to get you fired for incompetence.
What is the upside of this test? If they say nothing it may be that they don't know you're wrong or silently concluded you're wrong. If they do say something you say...what? "Just testing you"?
You say that it was a joke. It was a similar situation where a new VP was commenting on code he didn't know anything about but just repeated falsehoods with total conviction. So I put some stuff into a presentation that was clearly funny to people who knew how things worked but the VP took it at face value.
Most people won't call you out, especially in public.
I'd wager most people will just write you off as full of crap. Your test is setting yourself up to fail their test. :)
A little sense of humor goes far in such a situation.
It helps to establish among peers that he's full of it. Next time he says something, you'll take it with a grain of salt.
Considering the ongoing results, you might save your own career by establishing it....or end it.