I'm not sure if this is really related to Kotest. This piece of code I see in every kotlin project

Which one? The

jvmTarget

?

Yes

I see.

That usually means that your gradle project is targetting 1.6

This is a noob quesiton: so this setting is not going to target a specific jvm, it just gives directives to the Kotlin compiler to generate more modern (possibly Jvm 1.8 compatible) byte code.

As Leonardo said, Kotlintest was compiled against 1.6 before, and if you don't explicitly state a jvmTarget, then the Kotlin compiler uses 1.6. Kotest is compiled against 1.8. Your project is still targeting 1.6. So you can't use the

inline

from a 1.8 on the 1.6 JVM. What you put with

withType<Test>

will target only test tasks. Hopefully that helps. Are you targetting older versions of Android, or still using JDK 1.6 for your dev? Otherwise, may as well target 1.8 as there are a number of JVM improvements that allow for 'better' bytecode generation.

Thank you for the info! This and reading up on it helped a ton. 💯

Could we compile kotest to 1.6?

shouldThrow

was the only thing complaining.

that comes from kotest-assertions