diff --git a/testing/iframe.js b/testing/iframe.js
index ae6d2c6276ab..ad235f225f9c 100644
--- a/testing/iframe.js
+++ b/testing/iframe.js
@@ -198,8 +198,7 @@ export function createIframePromise(opt_runtimeOff, opt_beforeLayoutCallback) {
let iframe = document.createElement('iframe');
iframe.name = 'test_' + iframeCount++;
iframe.srcdoc = '' +
- '' +
- '';
+ '';
iframe.onload = function() {
// Flag as being a test window.
iframe.contentWindow.AMP_TEST_IFRAME = true;
@@ -224,8 +223,6 @@ export function createIframePromise(opt_runtimeOff, opt_beforeLayoutCallback) {
addElement: function(element) {
const iWin = iframe.contentWindow;
const p = onInsert(iWin).then(() => {
- // Make sure it has dimensions since no styles are available.
- element.style.display = 'block';
element.build(true);
if (!element.getPlaceholder()) {
const placeholder = element.createPlaceholder();