No corporation can legally force you to test their drugs unless you willingly sign some legally binding agreement consenting to being tested on.

Such as an employment contract that includes it in the fine print 🤷

I doubt IBM or Ford are going to force an employee to have drugs tested on them as a matter of contractual employment.

That's just because it's under an NDA. IBM is all about the ayahuasca and if you're gonna work at Ford, you can't be skipping Methadone Mondays or THC Thursdays.

I’d love to get paid to test experimental drugs. So far it’s only cost me money.

At least in the US, we're at will employment. So while we may not be able to forced to pee in a cup, we can and will be terminated if we don't comply.

Most places that have heavy machinery or manufacturing have formal drug policies with random testing. I have a relative that's an electrician and he's been randomly selected and had a coworker fail a test. Instead of firing the guy outright,they gave him an option to go to some class instead. He quit and changed careers given that choice.