Ignore coverage function in Jetbrains Intellij not working

Question

I have a back end application in Kotlin that communicates with the Slack API but these methods are really annoying to test, if it's even possible...

So I want Intellij to ignore them from the coverage, I have created a custom annotation to use:

@Target(AnnotationTarget.CLASS, AnnotationTarget.FUNCTION) @Retention(AnnotationRetention.SOURCE) annotation class IgnoreCoverage()

And this is how I implement is:

`@IgnoreCoverage fun start() {

    Thread {
        SocketModeApp(app).start()
    }.start()

}`

And under settings/build, Execution, Deployment/Coverage I have added the annotation to the 'Exclude annotations' under 'Java Coverage' but somehow it still includes all the Slack call methods in the test coverage