See https://builds.apache.org/job/maven-box/job/maven-checkstyle-plugin/job/MCHECKSTYLE-349/2/
Changes: * [MCHECKSTYLE-349] Upgrade to parent pom 31 * [MCHECKSTYLE-349] Upgrade to parent pom 31 * [MCHECKSTYLE-349] Upgrade to parent pom 31 * [MCHECKSTYLE-349] Upgrade to parent pom 31 * [MCHECKSTYLE-349] Upgrade to parent pom 31 * [MCHECKSTYLE-349] Upgrade to parent pom 31 All tests passed