----
val test by testing.suites.existing(JvmTestSuite::class)
tasks.named<Test>("myTestTask") {
    testClassesDirs = files(test.map { it.sources.output.classesDirs })
    classpath = files(test.map { it.sources.runtimeClasspath })
}
----
=====
[.multi-language-sample]
=====
.build.gradle
[source,groovy]
----
tasks.myTestTask {
    testClassesDirs = testing.suites.test.sources.output.classesDirs