---
title: Auto-discovery
description: Where poly-crap looks for a coverage report when none is named, and what happens when it finds none.
---

When neither the command line nor `.poly-crap.toml` names a report, poly-crap
looks under `--path` for the files coverage tools write by default, in this
order:

```text
coverage.lcov
lcov.info
coverage/lcov.info
coverage/coverage.lcov
coverage.out
coverage.xml
coverage/cobertura-coverage.xml
target/site/jacoco/jacoco.xml
build/reports/jacoco/test/jacocoTestReport.xml
```

It uses every report it finds and names them on stderr. When it finds none, it
warns that every function will follow the
[`--missing` policy](/coverage/matching-paths#functions-without-coverage),
which by default scores it as 0% covered. Pass `--no-auto-coverage` to skip
the search.

:::warning[Stale reports]
A report left over from last week scores today's code. Poly-crap warns on
stderr when a report is older than a source file it covers, but it still
scores the run. Regenerate the report before you scan.
:::