Step 3 - file with app.component.spec.ts TutorialHeaderModule

I was having a lot of problems with step 3.
And I restarted this step again.

On the beginning of fetch upstream step 3 it brings app.component.spect.ts file with:

"import { TutorialHeaderModule } from './tutorial-header/tutorial-header.module';"

when I run npm test it logs with "ERROR in app/app.component.spec.ts:5:38 - error TS2307: Cannot find module './tutorial-header/tutorial-header.module'."

Start with app/app.component.spec.ts and run npm test to reproduce the TS2307 error for TutorialHeaderModule. Check the tutorial's Step 3 state and the referenced tutorial-header path; done means the test no longer reports the missing module while preserving the intended Step 3 structure.

Written by the indexing model from the issue text.