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diff --git a/testing/web-platform/tests/html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html b/testing/web-platform/tests/html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html
new file mode 100644
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+++ b/testing/web-platform/tests/html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<meta name="timeout" content="long">
+<title>HTMLImageElement.prototype.decode(), iframe tests.</title>
+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decode">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<iframe id="frame_loaded" srcdoc="iframe"></iframe>
+<iframe id="frame_notloaded" srcdoc="iframe"></iframe>
+<iframe id="frame_notloaded2" srcdoc="iframe"></iframe>
+
+<script>
+"use strict";
+
+promise_test(function() {
+  return new Promise(function(resolve, reject) {
+    var frame = document.getElementById("frame_loaded");
+    var img = frame.contentDocument.createElement("img");
+    img.src = "/images/green.png";
+    img.onload = function() {
+      // At this point the frame which created the img is removed, so decode() should fail.
+      frame.parentNode.removeChild(frame);
+      img.decode().then(function() {
+        assert_unreached("Unexpected success");
+      }, function() {
+        resolve();
+      });
+    };
+  });
+}, document.title + " Decode from removed iframe fails (loaded img)");
+
+promise_test(function(t) {
+  var frame = document.getElementById("frame_notloaded");
+  var img = frame.contentDocument.createElement("img");
+  img.src = "/images/green.png";
+  frame.parentNode.removeChild(frame);
+  var promise = img.decode();
+  return promise_rejects_dom(t, "EncodingError", promise);
+}, document.title + " Decode from removed iframe fails (img not loaded)");
+
+promise_test(function(t) {
+  var frame = document.getElementById("frame_notloaded2");
+  var img = frame.contentDocument.createElement("img");
+  img.src = "/images/green.png";
+  // First request a promise, then remove the iframe.
+  var promise = img.decode();
+  frame.parentNode.removeChild(frame);
+  return promise_rejects_dom(t, "EncodingError", promise);
+}, document.title + " Decode from iframe, later removed, fails (img not loaded)");
+
+</script>
+