buildFile << """
            import org.gradle.workers.WorkerExecutor
            import javax.inject.Inject

            ${targetVersion < GradleVersion.version("6.0") ? defineGradle3WorkerRunnable() : defineGradleWorkAction()}

            task para1(type:ParTask)
            task para2(type:ParTask)
            task parallelTasks(dependsOn:[para1,para2])
        """
        server.expectConcurrent("para1", "para2")