Hi @AnsisMalins,

Whenever I run tests, lots of JScript tests fail

That might be due to a recently added Windows feature named "JScript Replacement", where the OS replaces classic JScript with a much faster, more secure, and more up-to-date JavaScript engine. Unfortunately, the new engine doesn't implement the full JScript host interface, so there's a way to opt out. Try one of the registry tweaks here.

Cheers!