can’t seem to get the CI to pass https://github.com/pantsbuild/pants/actions/runs/3171614156/jobs/5165838938:

rule_runner = RuleRunner(build_root=/tmp/_BUILD_ROOTxosqderi)

    def test_3rdparty_plugin(rule_runner: RuleRunner) -> None:
        # Test extra_files option
        rule_runner.write_files(
            {
                "f.py": "assert 1 == 1\n",
                ".bandit": "[bandit]\nskips: B101\n",
                "BUILD": "python_sources(name='t')",
            }
        )
        tgt = rule_runner.get_target(Address("", target_name="t", relative_file_path="f.py"))
        result = run_flake8(
            rule_runner,
            [tgt],
            extra_args=[
                "--flake8-extra-requirements=flake8-bandit==3.0.0",
                "--flake8-lockfile=<none>",
                "--flake8-extra-files=['.bandit']",
            ],
        )
        assert len(result) == 1
>       assert result[0].exit_code == 0
E       assert 1 == 0
E         +1
E         -0

src/python/pants/backend/python/lint/flake8/rules_integration_test.py:213: AssertionError
- generated xml file: /tmp/pants-sandbox-I8SwJL/src.python.pants.backend.python.lint.flake8.rules_integration_test.py.tests.xml -

What would be a good approach forward, filing an issue and skipping the test?

That's an internal test fix so no need to update the changelog, you just need to merge the commit to get your PR green.

I’ll try to pick this up later this evening, as there are commits going in during the day.