InspectionListener not detecting anything

Hi,

I'm trying to listen to inspections in my plugin

package net.tunisoft.inspect;

import com.intellij.codeInspection.ex.InspectListener
import com.intellij.codeInspection.ex.InspectionToolWrapper

class InspectionListener : InspectListener {
    override fun inspectionFinished(
        duration: Long,
        threadId: Long,
        tool: InspectionToolWrapper<*, *>?,
        kind: InspectListener.InspectionKind?
    ) {
        super.inspectionFinished(duration, threadId, tool, kind)
    }

    override fun activityFinished(duration: Long, threadId: Long, activityKind: InspectListener.ActivityKind?) {
        super.activityFinished(duration, threadId, activityKind)
    }
}

Plugin.xml

<projectListeners>
    <listener
            class="net.tunisoft.inspect.InspectionListener"
            topic="com.intellij.codeInspection.ex.InspectListener"/>
    <listener class="net.tunisoft.inspect.ProblemListener"
              topic="com.intellij.problems.ProblemListener"/>
</projectListeners>

The problem listener works fine but not the InspectionListener

Am I missing something obvious?

Thank you for your help