Why Can't I Evaluate Expressions When Debugging Kotlin Tests?

I have a gradle multi-project build with a mix of java and kotlin modules.

In one of the kotlin modules I have this

tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
    kotlinOptions {
        languageVersion = "1.1"
        apiVersion = "1.1"
        jvmTarget = "1.8"
        javaParameters = true 
    }
}

However, whenever I try to evaluate an expression when debugging some tests I get this error:

Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6. Please specify proper '-jvm-target' option

In the IDEA project settings, every Kotlin facet has the target platform set to 1.8 and ever module has the language level set to 8 (lamdas..) so why am I getting this error?