diff --git a/engine/src/flutter/tests/services/event-sender.sky b/engine/src/flutter/tests/services/event-sender.sky
index b6cdf80b36a..6c58ef9c1e3 100644
--- a/engine/src/flutter/tests/services/event-sender.sky
+++ b/engine/src/flutter/tests/services/event-sender.sky
@@ -30,7 +30,7 @@ void main() {
     var event = new events.Event();
     event.action = constants.EventType_KEY_PRESSED;
     event.keyData = keyData;
-    testHarness.dispatchInputEvent(event);
+    testHarness.ptr.dispatchInputEvent(event);
   });
 }
 </script>
diff --git a/engine/src/flutter/tests/services/iframe-embed-vmc.sky b/engine/src/flutter/tests/services/iframe-embed-vmc.sky
index 1396b0d66d7..e13f9a18d59 100644
--- a/engine/src/flutter/tests/services/iframe-embed-vmc.sky
+++ b/engine/src/flutter/tests/services/iframe-embed-vmc.sky
@@ -30,15 +30,15 @@ class IFrameEmbed extends Application {
     // resolve until the vmcApp's onEmbed() method runs.
     final echoService = new echo_service_mojom.EchoServiceProxy.unbound();
     vmcAppConnection.requestService(echoService);
-    echoService.echoString("success").then((response) {
+    echoService.ptr.echoString("success").then((response) {
       internals.notifyTestComplete(response.value);
     });
 
     var applicationPipe = new MojoMessagePipe();
     var proxyEndpoint = applicationPipe.endpoints[0];
     var applicationEndpoint = applicationPipe.endpoints[1];
-    vmcAppConnection.remoteServiceProvider.connectToService(
-        view_manager.ViewManagerClient.name, applicationEndpoint);
+    vmcAppConnection.remoteServiceProvider.ptr.connectToService(
+        view_manager.ViewManagerClientName, applicationEndpoint);
     document.querySelector("iframe").
         embedViewManagerClient(proxyEndpoint.handle.h);
   }
@@ -47,7 +47,6 @@ class IFrameEmbed extends Application {
 main() {
   var messagePipe = new MojoMessagePipe();
   var app = new IFrameEmbed(messagePipe.endpoints[1]);
-  app.listen();
   var shellProxy = new shell_mojom.ShellProxy.fromHandle(
       new MojoHandle(internals.takeShellProxyHandle()));
   app.initializeFromShellProxy(shellProxy, [], "");
diff --git a/engine/src/flutter/tests/services/network.sky b/engine/src/flutter/tests/services/network.sky
index c9e6fd79668..bdabb623cbc 100644
--- a/engine/src/flutter/tests/services/network.sky
+++ b/engine/src/flutter/tests/services/network.sky
@@ -12,18 +12,18 @@ import 'package:mojo/services/network/public/interfaces/network_service.mojom.da
 import 'package:mojo/services/network/public/interfaces/url_loader.mojom.dart';
 
 Future<String> run(url) async {
-  var networkService = new NetworkServiceProxy.unbound();
+  var networkService= new NetworkServiceProxy.unbound();
   embedder.connectToService("mojo:network_service", networkService);
 
-  var urlLoaderProxy = new UrlLoaderProxy.unbound();
-  networkService.createUrlLoader(urlLoaderProxy);
+  var urlLoader = new UrlLoaderProxy.unbound();
+  networkService.ptr.createUrlLoader(urlLoader);
 
   var urlRequest = new UrlRequest()
       ..url = url
       ..autoFollowRedirects = true;
-  var urlResponse = await urlLoaderProxy.start(urlRequest);
+  var urlResponse = await urlLoader.ptr.start(urlRequest);
 
-  urlLoaderProxy.close();
+  urlLoader.close();
   networkService.close();
 
   print("url => ${urlResponse.response.url}");