fun asyncResponseTo(request: KotlinBuildScriptModelRequest): Deferred<KotlinBuildScriptModel?> = async {
            subject.scriptModelFor(request)
        }

        // when:
        val pendingTasks =
            (0..2).map { index ->
                val request = newModelRequest()
                request to asyncResponseTo(request).also {
                    assertThat(