expect:
        fails("compileGroovy")
        failure.assertHasCause("Using a Groovy compiler configuration script requires Groovy 2.1+ but found Groovy $groovyVersionNumber")
    }

    def "useConfigurationScript"() {
        Assume.assumeFalse(versionLowerThan("2.1"))
        Assume.assumeFalse('Test must run with 9+, cannot guarantee that with a lower toolchain', getClass().name.contains("LowerToolchain"))

        expect: