diff --git a/test/custom_element_proxy_test.dart b/test/custom_element_proxy_test.dart
index b20a213..d95012e 100644
--- a/test/custom_element_proxy_test.dart
+++ b/test/custom_element_proxy_test.dart
@@ -32,7 +32,7 @@
 }
 
 main() {
-  initWebComponents().then((_) {
+  return initWebComponents().then((_) {
     var container = querySelector('#container') as DivElement;
 
     tearDown(() {
@@ -49,8 +49,6 @@
         var elements = container.querySelectorAll('basic-element');
         expect(elements.length, 2);
         for (BasicElement element in elements) {
-          print(element.outerHtml);
-          print(element.runtimeType);
           expect(element.isBasicElement, isTrue);
         }
       });
diff --git a/test/custom_element_proxy_test.html b/test/custom_element_proxy_test.html
index 384fbfd..8ecadeb 100644
--- a/test/custom_element_proxy_test.html
+++ b/test/custom_element_proxy_test.html
@@ -10,9 +10,9 @@
      .unittest-fail { background: #d55;}
      .unittest-error { background: #a11;}
   </style>
-  <script src="/packages/web_components/webcomponents.js"></script>
-  <script src="/packages/web_components/interop_support.js"></script>
-  <script src="/packages/web_components/dart_support.js"></script>
+  <script src="packages/web_components/webcomponents.js"></script>
+  <script src="packages/web_components/interop_support.js"></script>
+  <script src="packages/web_components/dart_support.js"></script>
 </head>
 <body>
   <h1> Running custom_element_proxy </h1>
diff --git a/test/custom_element_test.dart b/test/custom_element_test.dart
index 734c0e5..b0b8cf8 100644
--- a/test/custom_element_test.dart
+++ b/test/custom_element_test.dart
@@ -32,7 +32,7 @@
 }
 
 main() {
-  initWebComponents().then((_) {
+  return initWebComponents().then((_) {
     var container = querySelector('#container') as DivElement;
 
     setUp(() {