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diff --git a/toolkit/content/tests/widgets/test_videocontrols_error.html b/toolkit/content/tests/widgets/test_videocontrols_error.html
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+++ b/toolkit/content/tests/widgets/test_videocontrols_error.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Video controls test - Error</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <script type="text/javascript" src="head.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<p id="display"></p>
+
+<div id="content">
+  <video id="video" controls preload="auto"></video>
+</div>
+
+<pre id="test">
+<script clas="testbody" type="application/javascript">
+  const video = document.getElementById("video");
+  const statusOverlay = getElementWithinVideo(video, "statusOverlay");
+  const statusIcon = getElementWithinVideo(video, "statusIcon");
+  const statusLabelErrorNoSource = getElementWithinVideo(video, "errorNoSource");
+
+  add_task(async function setup() {
+    await SpecialPowers.pushPrefEnv({"set": [["media.cache_size", 40000]]});
+  });
+
+  add_task(async function check_normal_status() {
+    await new Promise(resolve => {
+      video.src = "seek_with_sound.ogg";
+      video.addEventListener("loadedmetadata", () => SimpleTest.executeSoon(resolve));
+    });
+
+    // Wait for the fade out transition to complete in case the throbber
+    // shows up on slower platforms.
+    await SimpleTest.promiseWaitForCondition(() => statusOverlay.hidden,
+      "statusOverlay should not present without error");
+
+    ok(!statusOverlay.hasAttribute("status"), "statusOverlay should not be showing a state message.");
+    isnot(statusIcon.getAttribute("type"), "error", "should not show error icon");
+  });
+
+  add_task(async function invalid_source() {
+    const errorType = "errorNoSource";
+
+    await new Promise(resolve => {
+      video.src = "invalid_source.ogg";
+      video.addEventListener("error", () => SimpleTest.executeSoon(resolve));
+    });
+
+    ok(!statusOverlay.hidden, `statusOverlay should show when ${errorType}`);
+    is(statusOverlay.getAttribute("status"), errorType, `statusOverlay should have correct error state: ${errorType}`);
+    is(statusIcon.getAttribute("type"), "error", `should show error icon when ${errorType}`);
+    isnot(statusLabelErrorNoSource.getBoundingClientRect().height, 0,
+      "errorNoSource status label should be visible.");
+  });
+</script>
+</pre>
+</body>
+</html>