diff --git a/x-pack/plugin/core/src/internalClusterTest/java/org/elasticsearch/snapshots/SourceOnlySnapshotIT.java b/x-pack/plugin/core/src/internalClusterTest/java/org/elasticsearch/snapshots/SourceOnlySnapshotIT.java
index 06a9b922c763f..6ea58bed120b8 100644
--- a/x-pack/plugin/core/src/internalClusterTest/java/org/elasticsearch/snapshots/SourceOnlySnapshotIT.java
+++ b/x-pack/plugin/core/src/internalClusterTest/java/org/elasticsearch/snapshots/SourceOnlySnapshotIT.java
@@ -198,7 +198,7 @@ private void assertMappings(String sourceIdx, boolean requireRouting, boolean us
                 "}}}}}", mapping.source().string());
         } else {
             assertEquals("{\"_doc\":{\"enabled\":false," +
-                "\"_meta\":{\"_doc\":{\"properties\":{\"field1\":{\"type\":\"text\"," +
+                "\"_meta\":{\"_doc\":{\"_meta\":{},\"properties\":{\"field1\":{\"type\":\"text\"," +
                 "\"fields\":{\"keyword\":{\"type\":\"keyword\",\"ignore_above\":256}}}" + nested + "}}}}}",
                 mapping.source().string());
         }