diff --git a/opensearch/src/test/java/zipkin2/storage/elasticsearch/OpensearchContainer.java b/opensearch/src/test/java/zipkin2/storage/elasticsearch/OpensearchContainer.java
index 6060176..447a8cf 100644
--- a/opensearch/src/test/java/zipkin2/storage/elasticsearch/OpensearchContainer.java
+++ b/opensearch/src/test/java/zipkin2/storage/elasticsearch/OpensearchContainer.java
@@ -47,7 +47,7 @@ class OpensearchContainer extends GenericContainer<OpensearchContainer> {
   ElasticsearchStorage.Builder newStorageBuilder() {
 
     WebClientBuilder builder = WebClient.builder("http://" + hostPort())
-      .factory(ClientFactory.builder().build());
+      .factory(ClientFactory.ofDefault());
     builder.decorator((delegate, ctx, req) -> {
       final HttpResponse response = delegate.execute(ctx, req);
       return HttpResponse.of(response.aggregate().thenApply(r -> {