diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image.html.ini
new file mode 100644
index 00000000000..a285ed1a1e3
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image.html.ini
@@ -0,0 +1,5 @@
+[pageload-image.html]
+  type: testharness
+  [The document for a standalone media file should have one child in the body.]
+    expected: FAIL
+
diff --git a/tests/wpt/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-image.html b/tests/wpt/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-image.html
index 9380b19f699..1f9c084fd00 100644
--- a/tests/wpt/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-image.html
+++ b/tests/wpt/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-image.html
@@ -13,6 +13,7 @@
 
   function frameLoaded() {
     var testframe = document.getElementById('testframe');
+    assert_equals(testframe.contentDocument.contentType, "image/png");
     var testframeChildren = testframe.contentDocument.body.childNodes;
     assert_equals(testframeChildren.length, 1, "Body of image document has 1 child");
     assert_equals(testframeChildren[0].nodeName, "IMG", "Only child of body must be an <img> element");
diff --git a/tests/wpt/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-video.html b/tests/wpt/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-video.html
index 8341731429f..69ef7413b38 100644
--- a/tests/wpt/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-video.html
+++ b/tests/wpt/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-video.html
@@ -13,6 +13,7 @@
 
   function frameLoaded() {
     var testframe = document.getElementById('testframe');
+    assert_equals(testframe.contentDocument.contentType, "video/webm");
     var testframeChildren = testframe.contentDocument.body.childNodes;
     assert_equals(testframeChildren.length, 1, "Body of image document has 1 child");
     assert_equals(testframeChildren[0].nodeName, "VIDEO", "Only child of body must be an <video> element");