private fun testApplicationWrapper2(testBlock: suspend ApplicationTestBuilder.(HttpClient) -> Unit) {
    testApplication {
        application {
            configureRouting()
            configureSerialization()
        }
        val client: HttpClient = createClient {
            install(ContentNegotiation) {
                json()
            }
        }

        testBlock(client)
        // usage found at <https://youtrack.jetbrains.com/issue/KTOR-4773>
    }
}