diff --git a/dom/media/test/eme.js b/dom/media/test/eme.js
index ec49c1511744..81f679762ce8 100644
--- a/dom/media/test/eme.js
+++ b/dom/media/test/eme.js
@@ -461,3 +461,35 @@ function SetupEMEPref(callback) {
 
   SpecialPowers.pushPrefEnv({ "set" : prefs }, callback);
 }
+
+function fetchWithXHR(uri, onLoadFunction) {
+  var p = new Promise(function(resolve, reject) {
+    var xhr = new XMLHttpRequest();
+    xhr.open("GET", uri, true);
+    xhr.responseType = "arraybuffer";
+    xhr.addEventListener("load", function () {
+      is(xhr.status, 200, "fetchWithXHR load uri='" + uri + "' status=" + xhr.status);
+      resolve(xhr.response);
+    });
+    xhr.send();
+  });
+
+  if (onLoadFunction) {
+    p.then(onLoadFunction);
+  }
+
+  return p;
+};
+
+function once(target, name, cb) {
+  var p = new Promise(function(resolve, reject) {
+    target.addEventListener(name, function onceEvent(arg) {
+      target.removeEventListener(name, onceEvent);
+      resolve(arg);
+    });
+  });
+  if (cb) {
+    p.then(cb);
+  }
+  return p;
+}
diff --git a/dom/media/test/mochitest.ini b/dom/media/test/mochitest.ini
index 87ff31f9ba20..42af1cc61e0e 100644
--- a/dom/media/test/mochitest.ini
+++ b/dom/media/test/mochitest.ini
@@ -540,6 +540,8 @@ support-files =
   sine.webm^headers^
   short.mp4
   short.mp4^headers^
+  short-audio-fragmented-cenc-without-pssh.mp4
+  short-audio-fragmented-cenc-without-pssh.mp4^headers^
   short-video.ogv
   short-video.ogv^headers^
   small-shot-mp3.mp4
@@ -688,6 +690,8 @@ skip-if = toolkit == 'android' # bug 1149374
 skip-if = toolkit == 'android' # bug 1149374
 [test_eme_initDataTypes.html]
 skip-if = toolkit == 'android' # bug 1149374
+[test_eme_missing_pssh.html]
+skip-if = toolkit == 'android' # bug 1149374
 [test_eme_non_mse_fails.html]
 skip-if = toolkit == 'android' # bug 1149374
 [test_eme_request_notifications.html]
diff --git a/dom/media/test/short-audio-fragmented-cenc-without-pssh.mp4 b/dom/media/test/short-audio-fragmented-cenc-without-pssh.mp4
new file mode 100644
index 000000000000..bc58623999f9
Binary files /dev/null and b/dom/media/test/short-audio-fragmented-cenc-without-pssh.mp4 differ
diff --git a/dom/media/test/short-audio-fragmented-cenc-without-pssh.mp4^headers^ b/dom/media/test/short-audio-fragmented-cenc-without-pssh.mp4^headers^
new file mode 100644
index 000000000000..4030ea1d3ddb
--- /dev/null
+++ b/dom/media/test/short-audio-fragmented-cenc-without-pssh.mp4^headers^
@@ -0,0 +1 @@
+Cache-Control: no-store
diff --git a/dom/media/test/test_eme_missing_pssh.html b/dom/media/test/test_eme_missing_pssh.html
new file mode 100644
index 000000000000..196ced4022b1
--- /dev/null
+++ b/dom/media/test/test_eme_missing_pssh.html
@@ -0,0 +1,92 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Test Encrypted Media Extensions</title>
+    <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="manifest.js"></script>
+    <script type="text/javascript" src="eme.js"></script>
+  </head>
+  <body>
+    <audio controls id="audio"></audio>
+    <pre id="test">
+    <script class="testbody" type="text/javascript">
+
+      // Tests that a fragmented MP4 file without a PSSH, but with valid encrypted
+      // tracks with valid TENC boxes, is able to load with EME.
+      // We setup MSE before starting up EME, so that we exercise the "waiting for
+      // cdm" step in the MediaDecoderStateMachine.
+
+      SimpleTest.waitForExplicitFinish();
+
+      var pssh = [
+        0x00, 0x00, 0x00, 0x00,
+        0x70, 0x73, 0x73, 0x68, // BMFF box header (76 bytes, 'pssh')
+        0x01, 0x00, 0x00, 0x00,                         // Full box header (version = 1, flags = 0)
+        0x10, 0x77, 0xef, 0xec, 0xc0, 0xb2, 0x4d, 0x02, // SystemID
+        0xac, 0xe3, 0x3c, 0x1e, 0x52, 0xe2, 0xfb, 0x4b,
+        0x00, 0x00, 0x00, 0x01,                         // KID_count (1)
+        0x2f, 0xef, 0x8a, 0xd8, 0x12, 0xdf, 0x42, 0x97,
+        0x83, 0xe9, 0xbf, 0x6e, 0x5e, 0x49, 0x3e, 0x53,
+        0x00, 0x00, 0x00, 0x00                         // Size of Data (0)
+      ];
+
+      var audio = document.getElementById("audio");
+
+      function LoadEME() {
+        var options = [{
+          initDataType: 'cenc',
+          audioType: 'audio/mp4; codecs="mp4a.40.2"',
+        }];
+        navigator.requestMediaKeySystemAccess("org.w3.clearkey", options)
+          .then((keySystemAccess) => {
+            return keySystemAccess.createMediaKeys();
+          }, bail("Failed to request key system access."))
+
+          .then((mediaKeys) => {
+            audio.setMediaKeys(mediaKeys);
+            var session = mediaKeys.createSession();
+            once(session, "message", (message) => {
+              is(message.messageType, 'license-request', "Expected a license-request");
+              var license = new TextEncoder().encode(JSON.stringify({
+                'keys': [{
+                  'kty':'oct',
+                  'kid':'L--K2BLfQpeD6b9uXkk-Uw',
+                  'k':HexToBase64('7f412f0575f44f718259beef56ec7771')
+                 }],
+                 'type': 'temporary'
+              }));
+              session.update(license);
+            });
+            session.generateRequest('cenc', new Uint8Array(pssh));
+          });
+      }
+
+      function DownloadMedia(url, type, mediaSource) {
+        return new Promise(function(resolve, reject) {
+          var sourceBuffer = mediaSource.addSourceBuffer(type);
+          fetchWithXHR(url, (response) => {
+            once(sourceBuffer, "updateend", resolve);
+            sourceBuffer.appendBuffer(new Uint8Array(response));
+          });
+        });
+      }
+
+      function LoadMSE() {
+        var ms = new MediaSource();
+        audio.src = URL.createObjectURL(ms);
+
+        once(ms, "sourceopen", ()=>{
+          DownloadMedia('short-audio-fragmented-cenc-without-pssh.mp4', 'audio/mp4; codecs="mp4a.40.2"', ms)
+            .then(() => { ms.endOfStream(); LoadEME();});
+        });
+
+        audio.addEventListener("loadeddata", SimpleTest.finish);
+      }
+
+      SetupEMEPref(LoadMSE);
+
+  </script>
+  </pre>
+  </body>
+</html>
