exec pint --no-color lint --fail-on=fatal --min-severity=bug rules
! stdout .
cmp stderr stderr.txt

-- rules/0001.yml --
groups:
  - name: foo
    rules:
    - alert: foo
      expr: up{job="xxx"}

-- stderr.txt --
level=INFO msg="Finding all rules to check" paths=["rules"]
level=INFO msg="Checking Prometheus rules" entries=1 workers=10 online=true
level=INFO msg="Problems found" Warning=1
level=INFO msg="1 problem(s) not visible because of --min-severity=bug flag"
