Claude sonnet 4 (this time last year) did do this. It once made simulation if a test script passing. Literally a script that just echoed test names and then said pass.

Change happens fast, a year old model is pretty outdated.

I'm sure it can happen, hence why I said to keep an eye out. Its main mode of operation is not to cook the tests however.

Happened to me, 3 days ago - deleted some tests and flipped assertions after outlining that it wasn't to change any assertions.

Our team was doing a similar task to move between test frameworks, and I had to do a git diff of hundreds of thousands of lines to try and work out where a test had disappeared to.

> 3 days ago

Your fault. You should have used a model from 0.000005 seconds ago!

Reading is difficult.

Not that difficult. You should try it sometimes!

Try to put in a little more effort next time. It makes for better discussions instead of "jokes" that aren't even relevant.

I discuss with civilised people who are up for civilised discussions.

You are the one ruining this discussion, it's worrying that you don't even realize it. I pointed out that models change quite a bit over time (I said more than that) and you ridicule my reply. "Your fault. You should have used a model from 0.000005 seconds ago!"

Civilised. Please.

Imagine not realizing that was a joke.

Imagine that, after I specifically called it a "joke". Result.. An irrelevant low quality meta discussion.

> Change happens fast, a year old model is pretty outdated.

What change? That you should not fake the results of a test because that defeats the whole purpose of a test has been known before there were computers.

I don't know, the weather?