# When a test fails

A `--fact` needs a passed test run (exit code 0, at least one test case); the daemon refuses a failed one (`400
invalid_request`) and the CLI suggests `--open`. Record the failure as an open item and cite the failed run with
`--evidence` (`last` when it is the latest run). To record only the failure you need not commit first: the run is
bound to the current state, uncommitted changes included, and nothing is claimed as done.

```bash
memprove run --test-format cargo -- cargo test      # exits 101
memprove checkpoint create --open "test adds fails: expected 5, got 4" \
  --evidence last --next "fix adds and rerun cargo test"
```