Gradle - dependency to test classes of another module

build.gradle

// use test classes from spring-common as dependency to tests of current module
testCompile files(this.project(':spring-common').sourceSets.test.output)

// use testCompile dependencies from spring-common as dependency to tests of current module
testCompile files(this.project(':spring-common').sourceSets.test.runtimeClasspath)

def isClassesDependency(module) {
     (module instanceof org.gradle.plugins.ide.idea.model.ModuleLibrary) && module.classes.iterator()[0].url.toString().contains(rootProject.name)
}

idea {
      module {
          scopes.PROVIDED.plus += configurations.provided
          iml.whenMerged { module ->
              module.dependencies.removeAll(module.dependencies.grep{isClassesDependency(it)})
              module.dependencies*.exported = true
          }
      }
  }
  
// and somewhere to include test classes 
testRuntime project(":spring-common")