diff --git a/webcomponents.js/webcomponents.js-tests.ts b/webcomponents.js/webcomponents.js-tests.ts
index e9c8990900..b5e67abb93 100644
--- a/webcomponents.js/webcomponents.js-tests.ts
+++ b/webcomponents.js/webcomponents.js-tests.ts
@@ -15,6 +15,8 @@ var XFoo = document.registerElement("x-foo", {
 });
 
 var xFoo = new XFoo();
+xFoo.textContent = "";
+document.body.appendChild(xFoo);
 
 window.CustomElements.hasNative;
 window.CustomElements.flags;
diff --git a/webcomponents.js/webcomponents.js.d.ts b/webcomponents.js/webcomponents.js.d.ts
index ba55ea573d..39a964a088 100644
--- a/webcomponents.js/webcomponents.js.d.ts
+++ b/webcomponents.js/webcomponents.js.d.ts
@@ -11,7 +11,7 @@ declare module webcomponents {
     }
 
     export interface CustomElementConstructor {
-        new():HTMLElement;
+        new(): HTMLElement;
     }
 
     export interface CustomElementsPolyfill {