diff --git a/elasticsearch/x-pack/watcher/src/test/java/org/elasticsearch/xpack/watcher/OldWatcherIndicesBackwardsCompatibilityIT.java b/elasticsearch/x-pack/watcher/src/test/java/org/elasticsearch/xpack/watcher/OldWatcherIndicesBackwardsCompatibilityIT.java
index 5848d298755..953db56e9ce 100644
--- a/elasticsearch/x-pack/watcher/src/test/java/org/elasticsearch/xpack/watcher/OldWatcherIndicesBackwardsCompatibilityIT.java
+++ b/elasticsearch/x-pack/watcher/src/test/java/org/elasticsearch/xpack/watcher/OldWatcherIndicesBackwardsCompatibilityIT.java
@@ -5,6 +5,7 @@
  */
 package org.elasticsearch.xpack.watcher;
 
+import org.apache.lucene.util.LuceneTestCase;
 import org.elasticsearch.AbstractOldXPackIndicesBackwardsCompatibilityTestCase;
 import org.elasticsearch.Version;
 import org.elasticsearch.action.search.SearchResponse;
@@ -32,6 +33,7 @@ import static org.hamcrest.Matchers.not;
 /**
  * Tests for watcher indexes created before 5.0.
  */
+@LuceneTestCase.AwaitsFix(bugUrl = "leaks trigger engine threads")
 public class OldWatcherIndicesBackwardsCompatibilityIT extends AbstractOldXPackIndicesBackwardsCompatibilityTestCase {
     @Override
     public Settings nodeSettings(int ord) {