Is it possible to add a real module as a dependency for the code under test?

[DevPrice]

That is, when I'm trying to test a transfomer:

transform("import * as SomeModule from \"some-module\"\n\nSomething.doThing()", options)

index.ts:1:29 - error TS2307: Cannot find module 'some-module'.

How do I bring the "some-module" dependency here for testing? I see that I can bring in mock dependencies; do I need to manully "mock" it using the real source?