>If they're too cool to waste a single second conforming to a basic FizzBuzz test
I'd be willing to waste 5 minutes tops, unless the employer has put some skin in the game (fizzbuzz is ok - nothing much more than that tho).
There's a 1,000 other employers out there who might be a better a fit. I am not going to do a 1 hour, 30 minute or even 15 minute task if they can't at least even be bothered to pick up the phone to talk to me or glance at my github profile.
Companies that expect completion of a weekend-filling exercise before granting you an interview are universally run by entitled assholes. You're actually doing yourself a favor by screening them out: they'll be bad to work for, you won't get to work with other 10x engineers and the company will likely achieve nothing impressive anyway.