> That being said though, I'd expect that a tuple would satisfy a `any[]` type. You have it backwards, the error in question is complaining that `any[]` does n

> That being said though, I'd expect that a tuple would satisfy a `any[]` type. You have it backwards, the error in question is complaining that `any[]` does not satisfy the tuple type. Minimal repro: function f(x: any[]): [number, string] { return x; } The error matches yours: Type 'any[]' is missing the following properties from type '[number, string]': 0, 1 From poking the playground, `any[]` hasn't been assignable to tuples since at least v3.3.3 My guess is that the compiler got smarter around reasoning about your `SinonSub` generic and is now forcing you to deal with lingering unsoundness.