diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 9dda2cb2e02..cfef4a11246 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -33717,7 +33717,16 @@
   },
   "local_changes": {
     "deleted": [],
-    "items": {},
+    "items": {
+      "testharness": {
+        "websockets/Send-data-worker.htm": [
+          {
+            "path": "websockets/Send-data-worker.htm",
+            "url": "/websockets/Send-data-worker.htm"
+          }
+        ]
+      }
+    },
     "reftest_nodes": {}
   },
   "reftest_nodes": {
diff --git a/tests/wpt/web-platform-tests/websockets/Send-data-worker.htm b/tests/wpt/web-platform-tests/websockets/Send-data-worker.htm
new file mode 100644
index 00000000000..bc946f12357
--- /dev/null
+++ b/tests/wpt/web-platform-tests/websockets/Send-data-worker.htm
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>W3C WebSocket API - Send data - WebSocket from Worker</title>
+    <script type="text/javascript" src="/resources/testharness.js"></script>
+    <script type="text/javascript" src="/resources/testharnessreport.js"></script>
+    <script type="text/javascript" src="websocket.js?pipe=sub"></script>
+</head>
+<body>
+    <div id="log"></div>
+    <script type="text/javascript">
+
+        async_test(function(t) {
+            var worker = new Worker("Send-data-worker.js");
+
+            var data = "test data";
+
+            worker.onmessage = t.step_func_done(function(e) {
+                assert_equals(e.data, data);
+            });
+
+            worker.postMessage(data);
+
+        }, "W3C WebSocket API - Send data on a WebSocket in a Worker")
+
+    </script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/websockets/Send-data-worker.js b/tests/wpt/web-platform-tests/websockets/Send-data-worker.js
new file mode 100644
index 00000000000..1bb0174b6f6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/websockets/Send-data-worker.js
@@ -0,0 +1,13 @@
+onmessage = function (evt) {
+    importScripts('websocket.js?pipe=sub')
+    var wsocket = CreateWebSocket(false, false, false);
+
+    wsocket.addEventListener('open', function (e) {
+        wsocket.send(evt.data)
+    }, true)
+
+    wsocket.addEventListener('message', function (e) {
+        postMessage(e.data);
+    }, true);
+}
+
