Observe stdout from Kotlin multiplatform test

A copy of my StackOverflow question.

I just want to see the output from a few simple println(...) in my Kotlin mulitplatform commonTest code. My build.gradle.kts looks a little like:

import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget

plugins {
    kotlin("multiplatform") version "1.3.61"
    kotlin("plugin.serialization") version "1.3.61"

kotlin {

   sourceSets {

        val commonMain by getting { ... }

        val commonTest by getting {
           dependencies {

        val jvmMain by getting { ... }

        val jvmTest by getting {
           dependencies {

        // and so on ...



Meanwhile in ~/src/commonTest/kotlin/my/company/library/CommonTest.kt:

package my.company.library

import kotlin.test.*

class CommonTest() {

   fun testTrue() {
      println("Hello, test!")


For the time being I’m running tests like this

./gradlew jvmTest

I want to see Hello, test! show up in the terminal. I don’t mind typing a little extra on the command line.

I haven’t been able to get testLogging.showStandardStreams to work, and I’m not sure how or if it actually interacts with the multiplatform test targets.