diff --git a/x-pack/plugin/shutdown/src/internalClusterTest/java/org/elasticsearch/xpack/shutdown/NodeShutdownTasksIT.java b/x-pack/plugin/shutdown/src/internalClusterTest/java/org/elasticsearch/xpack/shutdown/NodeShutdownTasksIT.java
index 6c5e1e6af69ce..8428416908679 100644
--- a/x-pack/plugin/shutdown/src/internalClusterTest/java/org/elasticsearch/xpack/shutdown/NodeShutdownTasksIT.java
+++ b/x-pack/plugin/shutdown/src/internalClusterTest/java/org/elasticsearch/xpack/shutdown/NodeShutdownTasksIT.java
@@ -184,7 +184,7 @@ public List<NamedXContentRegistry.Entry> getNamedXContent() {
         }
     }
 
-    public static class TaskExecutor extends PersistentTasksExecutor<TestTaskParams> implements ClusterStateListener {
+    public static final class TaskExecutor extends PersistentTasksExecutor<TestTaskParams> implements ClusterStateListener {
 
         private final PersistentTasksService persistentTasksService;