diff --git a/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/extension/async/TestAsyncServer.java b/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/extension/async/TestAsyncServer.java
index d16916415..e75ef11b6 100644
--- a/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/extension/async/TestAsyncServer.java
+++ b/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/extension/async/TestAsyncServer.java
@@ -91,10 +91,14 @@ public void close() throws Exception {
     }
 
     public InetSocketAddress start() throws Exception {
-        if (http1Config == null) {
-            return server.start(httpProcessor, exchangeHandlerDecorator, h2Config);
+        if (http1Config != null) {
+            server.configure(http1Config);
+        } else {
+            server.configure(h2Config);
         }
-        return server.start(httpProcessor, exchangeHandlerDecorator, http1Config);
+        server.configure(exchangeHandlerDecorator);
+        server.configure(httpProcessor);
+        return server.start();
     }
 
 }
diff --git a/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/extension/sync/TestServer.java b/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/extension/sync/TestServer.java
index d09e23170..039fcb7b7 100644
--- a/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/extension/sync/TestServer.java
+++ b/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/extension/sync/TestServer.java
@@ -60,7 +60,10 @@ public void shutdown(final CloseMode closeMode) {
     }
 
     public InetSocketAddress start() throws IOException {
-        server.start(http1Config, httpProcessor, exchangeHandlerDecorator);
+        server.configure(http1Config);
+        server.configure(exchangeHandlerDecorator);
+        server.configure(httpProcessor);
+        server.start();
         return new InetSocketAddress(server.getInetAddress(), server.getPort());
     }