diff --git a/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/security/support/CrossClusterShardTests.java b/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/security/support/CrossClusterShardTests.java
index 90e230606cdab..4476980d00303 100644
--- a/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/security/support/CrossClusterShardTests.java
+++ b/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/security/support/CrossClusterShardTests.java
@@ -69,6 +69,7 @@ public void testMe() throws Exception {
                             System.out.println("********************");
                             System.out.println(action.getClass().getName());
                             System.out.println(actionName);
+                            //TODO: check that these actions implement CrossClusterShardAction
                         }
                     }
                 }