diff --git a/core/jvm/src/main/scala/cats/effect/unsafe/metrics/ComputePoolSampler.scala b/core/jvm/src/main/scala/cats/effect/unsafe/metrics/ComputePoolSampler.scala
index d015150b62..d30d87c624 100644
--- a/core/jvm/src/main/scala/cats/effect/unsafe/metrics/ComputePoolSampler.scala
+++ b/core/jvm/src/main/scala/cats/effect/unsafe/metrics/ComputePoolSampler.scala
@@ -24,7 +24,7 @@ package metrics
  * @param queue
  *   the monitored local queue
  */
-private[unsafe] class ComputePoolSampler(compute: WorkStealingThreadPool)
+private[unsafe] final class ComputePoolSampler(compute: WorkStealingThreadPool)
     extends ComputePoolSamplerMBean {
   def getWorkerThreadCount(): Int = compute.getWorkerThreadCount()
   def getActiveThreadCount(): Int = compute.getActiveThreadCount()
diff --git a/core/jvm/src/main/scala/cats/effect/unsafe/metrics/LocalQueueSampler.scala b/core/jvm/src/main/scala/cats/effect/unsafe/metrics/LocalQueueSampler.scala
index 19985ea9c2..3abc9eb579 100644
--- a/core/jvm/src/main/scala/cats/effect/unsafe/metrics/LocalQueueSampler.scala
+++ b/core/jvm/src/main/scala/cats/effect/unsafe/metrics/LocalQueueSampler.scala
@@ -24,7 +24,8 @@ package metrics
  * @param queue
  *   the monitored local queue
  */
-private[unsafe] class LocalQueueSampler(queue: LocalQueue) extends LocalQueueSamplerMBean {
+private[unsafe] final class LocalQueueSampler(queue: LocalQueue)
+    extends LocalQueueSamplerMBean {
   def getFiberCount(): Int = queue.getFiberCount()
   def getHeadIndex(): Int = queue.getHeadIndex()
   def getTailIndex(): Int = queue.getTailIndex()