diff --git a/data-prepper-plugins/opensearch/src/test/resources/test-custom-index-policy-file.json b/data-prepper-plugins/opensearch/src/test/resources/test-custom-index-policy-file.json
index bbc62b4ee5..16081c295e 100644
--- a/data-prepper-plugins/opensearch/src/test/resources/test-custom-index-policy-file.json
+++ b/data-prepper-plugins/opensearch/src/test/resources/test-custom-index-policy-file.json
@@ -16,7 +16,8 @@
       }
     ],
     "ism_template": {
-      "index_patterns": ["sink-custom-index-ism-test-alias-*"]
+      "priority": 100,
+      "index_patterns": ["dummy-pattern-*"]
     }
   }
-}
\ No newline at end of file
+}