SourceSet yamlCompatTestSourceSet = sourceSets.create(SOURCE_SET_NAME);
        SourceSet yamlTestSourceSet = sourceSets.getByName(InternalYamlRestTestPlugin.SOURCE_SET_NAME);
        GradleUtils.extendSourceSet(project, InternalYamlRestTestPlugin.SOURCE_SET_NAME, SOURCE_SET_NAME);

        // copy compatible rest specs
        Configuration bwcMinorConfig = project.getConfigurations().create(BWC_MINOR_CONFIG_NAME);