diff --git a/src/test/java/org/opensearch/flowframework/FlowFrameworkRestTestCase.java b/src/test/java/org/opensearch/flowframework/FlowFrameworkRestTestCase.java
index c5f6aee13..4fe726ef8 100644
--- a/src/test/java/org/opensearch/flowframework/FlowFrameworkRestTestCase.java
+++ b/src/test/java/org/opensearch/flowframework/FlowFrameworkRestTestCase.java
@@ -692,7 +692,7 @@ protected List<String> catPlugins() throws IOException {
             "_cat/plugins?s=component&h=name,component,version,description&format=json",
             null,
             "",
-            ImmutableList.of(new BasicHeader(HttpHeaders.USER_AGENT, ""))
+            List.of(new BasicHeader(HttpHeaders.USER_AGENT, ""))
         );
         List<Object> pluginsList = JsonXContent.jsonXContent.createParser(
             NamedXContentRegistry.EMPTY,