fix: add new test so we have test coverage (#6056)
### Description
I merged #6052 prematurely not realizing that JS tests didn't run. This
PR fixes main by getting our test coverage back up.
Future work is looking into why JS tests didn't run.
### Testing Instructions
`turbo run check-types test`
Closes TURBO-1372
Co-authored-by: Chris Olszewski <Chris Olszewski>
