diff --git a/test/form-item.html b/test/form-item.html
index fcd8e5c..a4f0328 100644
--- a/test/form-item.html
+++ b/test/form-item.html
@@ -5,6 +5,7 @@
   <title>vaadin-form-layout tests</title>
   <script src="../../web-component-tester/browser.js"></script>
   <script src="../../webcomponentsjs/webcomponents-lite.js"></script>
+  <link rel="import" href="../../test-fixture/test-fixture.html">
   <link rel="import" href="../vaadin-form-item.html">
 </head>
 
diff --git a/test/form-layout.html b/test/form-layout.html
index 0e5c8ac..a85b00f 100644
--- a/test/form-layout.html
+++ b/test/form-layout.html
@@ -5,6 +5,7 @@
   <title>vaadin-form-layout tests</title>
   <script src="../../web-component-tester/browser.js"></script>
   <script src="../../webcomponentsjs/webcomponents-lite.js"></script>
+  <link rel="import" href="../../test-fixture/test-fixture.html">
   <link rel="import" href="../../vaadin-text-field/vaadin-text-field.html">
   <link rel="import" href="../../paper-input/paper-input.html">
   <link rel="import" href="../vaadin-form-layout.html">
diff --git a/wct.conf.js b/wct.conf.js
index 44fa12a..6af45ca 100644
--- a/wct.conf.js
+++ b/wct.conf.js
@@ -18,7 +18,9 @@ module.exports = {
       'macOS 10.12/iphone@11.2',
       'macOS 10.12/ipad@11.2',
       'Windows 10/chrome@65',
-      'macOS 10.12/safari@11.0'
+      'macOS 10.12/safari@11.0',
+      'Windows 10/firefox@59',
+      'Windows 10/microsoftedge@16'
     ];
 
     var cronPlatforms = [