Tags not working on KMP project

Version: 6.0.0.M3

Hello dear maintainers, i followed documentation for grouping tests by tags https://kotest.io/docs/framework/tags.html but it doesn't seem to work well on KMP project. Here is the command i run:

./gradlew testDebugUnitTest -Dkotest.tags="NotImportant"

There are 2 tests in Android and 2 in Main, each has one "Important" and one "NotImportant" test. I would assume only 2 test will be executed. Below is the output:

com.test.MainTest STANDARD_OUT
    Main kotest.tags->: NotImportant
com.test.MainTest > Main Important PASSED
com.test.MainTest > Main NotImportant PASSED

com.test.android.AndroidTest STANDARD_OUT
    Android kotest.tags->: NotImportant
com.test.android.AndroidTest > android Important PASSED
com.test.android.AndroidTest > android NotImportant PASSED

And here are the sample test for main/android.

// src/androidUnitTest

class AndroidTest : StringSpec() {
  init {
    println("Android kotest.tags->: ${System.getProperty("kotest.tags")}")

    "android Important".config(tags = setOf(Important)) {
      true shouldBeEqual true
    }

    "android NotImportant".config(tags = setOf(NotImportant)) {
      true shouldBeEqual true
    }
  }
}

// src/commonTest
val Important = NamedTag("Important")
val NotImportant = NamedTag("NotImportant")

class MainTest : StringSpec() {
  init {
    println("Main kotest.tags->: ${System.getProperty("kotest.tags")}")

    "Main Important".config(tags = setOf(Important)) {
      true shouldBeEqual true
    }

    "Main NotImportant".config(tags = setOf(NotImportant)) {
      true shouldBeEqual true
    }
  }
}

I tried also different Spec styles and different declaration of tag(class scope) but with no luck. Run out of ideas so opening this issue. Thanks a look for looking into it. EDIT: It seems to work fine with 5.9.1 , however we are unable the run the iOS tests as we are using kotlin 2.+ Martin

Same here using 6.0.1... I’m confident my Gradle configuration is correct. To inject kotest.tags I configured the test task as stated in documentation:

 systemProperties = System.getProperties().asIterable().associate { it.key.toString() to it.value 

Printing systemProperties confirms the property is configured correctly.

If we're using annotations, RequiresTag will always skip the test without a care, whereas Tags runs everything every time.