Getting rid of: **WARNING: An illegal reflective access operation has occurred** by updating the dependencies to more recent versions. The followoing list works for me building against J11 (see below) using `mvn clean install` These changed made the warning go away. The build completes with success: - guava: 31.0.1-jre - slf4j: 1.7.32 - guice: 5.0.1 - guice-assistedinject: 5.0.1 - spock-core: 2.0-groovy-3.0 - gmavenplus-plugin: 1.13.0 - maven-surefire-plugin: 3.0.0-M5 - jacoco-maven-plugin: 0.8.7 Info: Apache Maven 3.8.2 (ea98e05a04480131370aa0c110b8c54cf726c06f) Maven home: apache-maven-3.8.2 Java version: 11.0.12, vendor: GraalVM Community, runtime: graalvm-ce-java11-21.2.0 Default locale: de_DE, platform encoding: Cp1252 OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"