# X_TEST_NO_FILES

## Means

the test selection matched no files

## Typical cause

a type or `--filter` that matches nothing, or `x test` run outside the app

## Fix

drop the filter (`x test`), or point it at the right root: `x test --cwd <repo root>`. A green run over zero files is the most expensive false pass

[CLI and verify](/error-codes#cli-and-verify)