diff --git a/dom/media/test/eme.js b/dom/media/test/eme.js
index cf9dc6bc79fb..fb741a4792b0 100644
--- a/dom/media/test/eme.js
+++ b/dom/media/test/eme.js
@@ -156,6 +156,17 @@ function MaybeCrossOriginURI(test, uri)
   }
 }
 
+function BSD16(a)
+{
+  var c = 0x1234;
+  var i = 0;
+  var l = a.length;
+  for (i = 0; i < l; i++) {
+    c = (((((c >>> 1) + ((c & 1) << 15)) | 0) + (a[i] & 0xff)) & 0xffff) | 0;
+  }
+  return c;
+};
+
 function AppendTrack(test, ms, track, token)
 {
   return new Promise(function(resolve, reject) {
@@ -172,15 +183,31 @@ function AppendTrack(test, ms, track, token)
         return;
       }
 
-      fragmentFile = MaybeCrossOriginURI(test, track.fragments[curFragment++]);
+      var fragment = track.fragments[curFragment++];
+      if (typeof fragment === "string") {
+        fragment = { file:fragment, size:-1, bsd16:-1 };
+      }
+
+      fragmentFile = MaybeCrossOriginURI(test, fragment.file);
 
       var req = new XMLHttpRequest();
       req.open("GET", fragmentFile);
       req.responseType = "arraybuffer";
 
       req.addEventListener("load", function() {
+        var u8array = new Uint8Array(req.response);
+        if (fragment.size !== undefined && fragment.size >= 0) {
+          is(u8array.length, fragment.size,
+             token + " fragment '" + fragmentFile + "' size: expected "
+             + fragment.size + ", got " + u8array.length);
+        }
+        if (fragment.bsd16 !== undefined && fragment.bsd16 >= 0) {
+          is(BSD16(u8array), fragment.bsd16,
+             token + " fragment '" + fragmentFile + "' checksum: expected "
+             + fragment.bsd16 + ", got " + BSD16(u8array));
+        }
         Log(token, track.name + ": fetch of " + fragmentFile + " complete, appending");
-        sb.appendBuffer(new Uint8Array(req.response));
+        sb.appendBuffer(u8array);
       });
 
       req.addEventListener("error", function(){info(token + " error fetching " + fragmentFile);});
diff --git a/dom/media/test/manifest.js b/dom/media/test/manifest.js
index 82fd44285ba1..4a77e0d99c1f 100644
--- a/dom/media/test/manifest.js
+++ b/dom/media/test/manifest.js
@@ -652,9 +652,9 @@ var gEMETests = [
       {
         name:"video",
         type:"video/mp4; codecs=\"avc1.64000d\"",
-        fragments:[ "bipbop-cenc-videoinit.mp4",
-                    "bipbop-cenc-video1.m4s",
-                    "bipbop-cenc-video2.m4s",
+        fragments:[ { file:"bipbop-cenc-videoinit.mp4", size:1058, bsd16:63578 },
+                    { file:"bipbop-cenc-video1.m4s", size:25211, bsd16:39494 },
+                    { file:"bipbop-cenc-video2.m4s", size:22934, bsd16:24908 },
                   ]
       }
     ],
@@ -673,9 +673,9 @@ var gEMETests = [
       {
         name:"video",
         type:"video/mp4; codecs=\"avc1.64000d\"",
-        fragments:[ "bipbop-cenc-videoinit.mp4",
-                    "bipbop-cenc-video1.m4s",
-                    "bipbop-cenc-video2.m4s",
+        fragments:[ { file:"bipbop-cenc-videoinit.mp4", size:1058, bsd16:63578 },
+                    { file:"bipbop-cenc-video1.m4s", size:25211, bsd16:39494 },
+                    { file:"bipbop-cenc-video2.m4s", size:22934, bsd16:24908 },
                   ]
       }
     ],
@@ -695,19 +695,19 @@ var gEMETests = [
       {
         name:"audio",
         type:"audio/mp4; codecs=\"mp4a.40.2\"",
-        fragments:[ "bipbop-cenc-audioinit.mp4",
-                    "bipbop-cenc-audio1.m4s",
-                    "bipbop-cenc-audio2.m4s",
-                    "bipbop-cenc-audio3.m4s",
+        fragments:[ { file:"bipbop-cenc-audioinit.mp4", size:1000, bsd16:50248 },
+                    { file:"bipbop-cenc-audio1.m4s", size:921, bsd16:21737 },
+                    { file:"bipbop-cenc-audio2.m4s", size:565, bsd16:14663 },
+                    { file:"bipbop-cenc-audio3.m4s", size:977, bsd16:38572 },
                   ],
       },
       {
         name:"video",
         type:"video/mp4; codecs=\"avc1.64000d\"",
-        fragments:[ "bipbop-cenc-videoinit.mp4",
-                    "bipbop-cenc-video1.m4s",
-                    "bipbop-cenc-video2.m4s",
-                  ],
+        fragments:[ { file:"bipbop-cenc-videoinit.mp4", size:1058, bsd16:63578 },
+                    { file:"bipbop-cenc-video1.m4s", size:25211, bsd16:39494 },
+                    { file:"bipbop-cenc-video2.m4s", size:22934, bsd16:24908 },
+                  ]
       },
     ],
     keys: {
@@ -725,19 +725,19 @@ var gEMETests = [
       {
         name:"audio",
         type:"audio/mp4; codecs=\"mp4a.40.2\"",
-        fragments:[ "bipbop-cenc-audioinit.mp4",
-                    "bipbop-cenc-audio1.m4s",
-                    "bipbop-cenc-audio2.m4s",
-                    "bipbop-cenc-audio3.m4s",
+        fragments:[ { file:"bipbop-cenc-audioinit.mp4", size:1000, bsd16:50248 },
+                    { file:"bipbop-cenc-audio1.m4s", size:921, bsd16:21737 },
+                    { file:"bipbop-cenc-audio2.m4s", size:565, bsd16:14663 },
+                    { file:"bipbop-cenc-audio3.m4s", size:977, bsd16:38572 },
                   ],
       },
       {
         name:"video",
         type:"video/mp4; codecs=\"avc1.64000d\"",
-        fragments:[ "bipbop-cenc-videoinit.mp4",
-                    "bipbop-cenc-video1.m4s",
-                    "bipbop-cenc-video2.m4s",
-                  ],
+        fragments:[ { file:"bipbop-cenc-videoinit.mp4", size:1058, bsd16:63578 },
+                    { file:"bipbop-cenc-video1.m4s", size:25211, bsd16:39494 },
+                    { file:"bipbop-cenc-video2.m4s", size:22934, bsd16:24908 },
+                  ]
       },
     ],
     keys: {