# X_TEST_ISLAND_NOT_BUILT

## Means

the island build produced no chunk for the file the test named

## Typical cause

`mountIsland` was given a `file` the builder never produced — a path relative to the test instead of to the app root, a typo, or an island outside `apps/*/{site,app,shared}/**/*.island.tsx`. One symptom, three different edits, so `cause` lists what the build DID produce; an empty list means the glob found nothing under this `root` at all

## Fix

copy a path the cause lists into `file:` — it is app-root-relative — or, when nothing was built, `x g island <name> --at apps/web/site` and point `root` at the directory holding `apps/`

[Testing](/error-codes#testing)