diff --git a/test/data/html/test-document2.html b/test/data/html/test-document2.html
index 7f7120d2..bb7bfb97 100644
--- a/test/data/html/test-document2.html
+++ b/test/data/html/test-document2.html
@@ -98,7 +98,7 @@
 
     <y-test>
         <y-description>&lt;iframe&gt; element with data URL.</y-description>
-        <iframe id="iframe-with-data-url" src="data:text/html;base64,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" allowfullscreen="true" class="container"></iframe>
+        <iframe id="iframe-with-data-url" src="data:text/html;base64,PCFET0NUWVBFIGh0bWw+DQo8aHRtbD4NCiAgICA8aGVhZD4NCiAgICAgICAgPG1ldGEgY2hhcnNldD0iVVRGLTgiPg0KICAgICAgICA8bWV0YSBuYW1lPSJ2aWV3cG9ydCIgY29udGVudD0id2lkdGg9ZGV2aWNlLXdpZHRoLGluaXRpYWwtc2NhbGU9MSI+DQogICAgICAgIDx0aXRsZT5Zb21pY2hhbiBUZXN0czwvdGl0bGU+DQogICAgICAgIDxzY3JpcHQ+DQogZnVuY3Rpb24gcmVxdWVzdEZ1bGxzY3JlZW4oZWxlbWVudCkgew0KICAgIGlmIChlbGVtZW50LnJlcXVlc3RGdWxsc2NyZWVuKSB7DQogICAgICAgIGVsZW1lbnQucmVxdWVzdEZ1bGxzY3JlZW4oKTsNCiAgICB9IGVsc2UgaWYgKGVsZW1lbnQubW96UmVxdWVzdEZ1bGxTY3JlZW4pIHsNCiAgICAgICAgZWxlbWVudC5tb3pSZXF1ZXN0RnVsbFNjcmVlbigpOw0KICAgIH0gZWxzZSBpZiAoZWxlbWVudC53ZWJraXRSZXF1ZXN0RnVsbHNjcmVlbikgew0KICAgICAgICBlbGVtZW50LndlYmtpdFJlcXVlc3RGdWxsc2NyZWVuKCk7DQogICAgfSBlbHNlIGlmIChlbGVtZW50Lm1zUmVxdWVzdEZ1bGxzY3JlZW4pIHsNCiAgICAgICAgZWxlbWVudC5tc1JlcXVlc3RGdWxsc2NyZWVuKCk7DQogICAgfQ0KfQ0KDQpmdW5jdGlvbiBleGl0RnVsbHNjcmVlbigpIHsNCiAgICBpZiAoZG9jdW1lbnQuZXhpdEZ1bGxzY3JlZW4pIHsNCiAgICAgICAgZG9jdW1lbnQuZXhpdEZ1bGxzY3JlZW4oKTsNCiAgICB9IGVsc2UgaWYgKGRvY3VtZW50Lm1vekNhbmNlbEZ1bGxTY3JlZW4pIHsNCiAgICAgICAgZG9jdW1lbnQubW96Q2FuY2VsRnVsbFNjcmVlbigpOw0KICAgIH0gZWxzZSBpZiAoZG9jdW1lbnQud2Via2l0RXhpdEZ1bGxzY3JlZW4pIHsNCiAgICAgICAgZG9jdW1lbnQud2Via2l0RXhpdEZ1bGxzY3JlZW4oKTsNCiAgICB9IGVsc2UgaWYgKGRvY3VtZW50Lm1zRXhpdEZ1bGxzY3JlZW4pIHsNCiAgICAgICAgZG9jdW1lbnQubXNFeGl0RnVsbHNjcmVlbigpOw0KICAgIH0NCn0NCg0KZnVuY3Rpb24gZ2V0RnVsbHNjcmVlbkVsZW1lbnQoKSB7DQogICAgcmV0dXJuICgNCiAgICAgICAgZG9jdW1lbnQuZnVsbHNjcmVlbkVsZW1lbnQgfHwNCiAgICAgICAgZG9jdW1lbnQubXNGdWxsc2NyZWVuRWxlbWVudCB8fA0KICAgICAgICBkb2N1bWVudC5tb3pGdWxsU2NyZWVuRWxlbWVudCB8fA0KICAgICAgICBkb2N1bWVudC53ZWJraXRGdWxsc2NyZWVuRWxlbWVudCB8fA0KICAgICAgICBudWxsDQogICAgKTsNCn0NCg0KZnVuY3Rpb24gdG9nZ2xlRnVsbHNjcmVlbihlbGVtZW50KSB7DQogICAgaWYgKGdldEZ1bGxzY3JlZW5FbGVtZW50KCkpIHsNCiAgICAgICAgZXhpdEZ1bGxzY3JlZW4oKTsNCiAgICB9IGVsc2Ugew0KICAgICAgICByZXF1ZXN0RnVsbHNjcmVlbihlbGVtZW50KTsNCiAgICB9DQp9DQoNCmZ1bmN0aW9uIHNldHVwKGNvbnRhaW5lciwgZnVsbHNjcmVlbkVsZW1lbnQ9bnVsbCkgew0KICAgIGNvbnN0IGZ1bGxzY3JlZW5MaW5rID0gY29udGFpbmVyLnF1ZXJ5U2VsZWN0b3IoJy5mdWxsc2NyZWVuLWxpbmsnKTsNCiAgICBpZiAoZnVsbHNjcmVlbkxpbmsgIT09IG51bGwpIHsNCiAgICAgICAgaWYgKGZ1bGxzY3JlZW5FbGVtZW50ID09PSBudWxsKSB7DQogICAgICAgICAgICBmdWxsc2NyZWVuRWxlbWVudCA9IGNvbnRhaW5lci5xdWVyeVNlbGVjdG9yKCcuZnVsbHNjcmVlbi1lbGVtZW50Jyk7DQogICAgICAgIH0NCiAgICAgICAgZnVsbHNjcmVlbkxpbmsuYWRkRXZlbnRMaXN0ZW5lcignY2xpY2snLCAoZSkgPT4gew0KICAgICAgICAgICAgdG9nZ2xlRnVsbHNjcmVlbihmdWxsc2NyZWVuRWxlbWVudCk7DQogICAgICAgICAgICBlLnByZXZlbnREZWZhdWx0KCk7DQogICAgICAgICAgICByZXR1cm4gZmFsc2U7DQogICAgICAgIH0sIGZhbHNlKTsNCiAgICB9DQoNCiAgICBjb25zdCB0ZW1wbGF0ZSA9IGNvbnRhaW5lci5xdWVyeVNlbGVjdG9yKCd0ZW1wbGF0ZScpOw0KICAgIGNvbnN0IHRlbXBsYXRlQ29udGVudENvbnRhaW5lciA9IGNvbnRhaW5lci5xdWVyeVNlbGVjdG9yKCcudGVtcGxhdGUtY29udGVudC1jb250YWluZXInKTsNCiAgICBpZiAodGVtcGxhdGUgIT09IG51bGwgJiYgdGVtcGxhdGVDb250ZW50Q29udGFpbmVyICE9PSBudWxsKSB7DQogICAgICAgIGNvbnN0IG1vZGUgPSBjb250YWluZXIuZGF0YXNldC5zaGFkb3dNb2RlOw0KICAgICAgICBjb25zdCBzaGFkb3cgPSB0ZW1wbGF0ZUNvbnRlbnRDb250YWluZXIuYXR0YWNoU2hhZG93KHttb2RlfSk7DQoNCiAgICAgICAgY29uc3QgY29udGFpbmVyU3R5bGVzID0gZG9jdW1lbnQucXVlcnlTZWxlY3RvcignI2NvbnRhaW5lci1zdHlsZXMnKTsNCiAgICAgICAgc2hhZG93LmFwcGVuZENoaWxkKGNvbnRhaW5lclN0eWxlcy5jbG9uZU5vZGUodHJ1ZSkpOw0KDQogICAgICAgIGNvbnN0IGNvbnRlbnQgPSBkb2N1bWVudC5pbXBvcnROb2RlKHRlbXBsYXRlLmNvbnRlbnQsIHRydWUpOw0KICAgICAgICBzZXR1cChjb250ZW50KTsNCiAgICAgICAgc2hhZG93LmFwcGVuZENoaWxkKGNvbnRlbnQpOw0KICAgIH0NCn0NCiAgICAgICAgPC9zY3JpcHQ+DQogICAgICAgIDxzdHlsZT4NCmJvZHkgew0KICAgIGZvbnQtZmFtaWx5OiAiSGVsdmV0aWNhIE5ldWUiLCBIZWx2ZXRpY2EsIEFyaWFsLCBzYW5zLXNlcmlmOw0KICAgIGZvbnQtc2l6ZTogMTRweDsNCiAgICBwYWRkaW5nOiAwOw0KICAgIG1hcmdpbjogMDsNCiAgICBiYWNrZ3JvdW5kLWNvbG9yOiAjZjhmOGY4Ow0KfQ0KYSwgYTp2aXNpdGVkIHsNCiAgICBjb2xvcjogIzEwODBjMDsNCiAgICB0ZXh0LWRlY29yYXRpb246IHVuZGVybGluZTsNCn0NCi5jb250ZW50IHsNCiAgICBwb3NpdGlvbjogYWJzb2x1dGU7DQogICAgbGVmdDogMDsNCiAgICB0b3A6IDA7DQogICAgcmlnaHQ6IDA7DQogICAgYm90dG9tOiAwOw0KICAgIHBhZGRpbmc6IDAuNWVtOw0KICAgIGJhY2tncm91bmQtY29sb3I6ICNmOGY4Zjg7DQp9DQogICAgICAgIDwvc3R5bGU+DQogICAgPC9oZWFkPg0KPGJvZHk+PGRpdiBjbGFzcz0iY29udGVudCI+DQo8ZGl2Pg0KICAgIOOBguOCiuOBjOOBqOOBhg0KPC9kaXY+DQo8ZGl2Pg0KICAgIDxhIGhyZWY9IiMiIGNsYXNzPSJmdWxsc2NyZWVuLWxpbmsiPlRvZ2dsZSBmdWxsc2NyZWVuPC9hPg0KICAgIDxzY3JpcHQ+c2V0dXAoZG9jdW1lbnQuYm9keSwgZG9jdW1lbnQuYm9keSk7PC9zY3JpcHQ+DQo8L2Rpdj4NCjwvZGl2PjwvYm9keT4NCjwvaHRtbD4=" allowfullscreen="true" class="container"></iframe>
     </y-test>
 
     <y-test>
@@ -106,6 +106,11 @@
         <iframe id="iframe-with-blob-url" allowfullscreen="true" class="container"></iframe>
     </y-test>
 
+    <y-test>
+        <y-description>&lt;iframe&gt; element with srcdoc.</y-description>
+        <iframe id="iframe-with-srcdoc" allowfullscreen="true" class="container"></iframe>
+    </y-test>
+
     <y-test>
         <y-description>SVG &lt;img&gt;.</y-description>
         <img src="test-document2-frame2.svg" class="container" alt="">
@@ -154,14 +159,19 @@
         return array;
     }
 
-    function dataUrlToBlob(dataUrl) {
-        let [, type, isBase64, data] = /^data:([^;]*);(base64,)?([\w\W]*)$/.exec(dataUrl);
-        data = (
+    function dataUrlToContent(dataUrl) {
+        const [, type, isBase64, data] = /^data:([^;]*);(base64,)?([\w\W]*)$/.exec(dataUrl);
+        const content = (
             isBase64 ?
             new TextDecoder().decode(stringToTypedArray(atob(data))) :
             data
         );
-        return new Blob([data], {type});
+        return {content, type};
+    }
+
+    function dataUrlToBlob(dataUrl) {
+        const {content, type} = dataUrlToContent(dataUrl);
+        return new Blob([content], {type});
     }
 
     for (const element of document.querySelectorAll('y-test')) {
@@ -170,7 +180,9 @@
 
     const iframeWithDataUrl = document.querySelector('#iframe-with-data-url');
     const iframeWithBlobUrl = document.querySelector('#iframe-with-blob-url');
+    const iframeWithSrcdoc = document.querySelector('#iframe-with-srcdoc');
     iframeWithBlobUrl.src = URL.createObjectURL(dataUrlToBlob(iframeWithDataUrl.src));
+    iframeWithSrcdoc.srcdoc = dataUrlToContent(iframeWithDataUrl.src).content;
 })();
     </script>