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diff --git a/devtools/server/socket/tests/chrome/test_websocket-server.html b/devtools/server/socket/tests/chrome/test_websocket-server.html
new file mode 100644
index 0000000000..b809aca0a5
--- /dev/null
+++ b/devtools/server/socket/tests/chrome/test_websocket-server.html
@@ -0,0 +1,88 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Mozilla Bug</title>
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
+</head>
+<body>
+<script>
+"use strict";
+
+window.onload = function() {
+  const { require } = ChromeUtils.importESModule("resource://devtools/shared/loader/Loader.sys.mjs");
+  const WebSocketServer = require("devtools/server/socket/websocket-server");
+
+  const ServerSocket = Components.Constructor("@mozilla.org/network/server-socket;1",
+    "nsIServerSocket", "init");
+
+  add_task(async function() {
+    // Create a TCP server on auto-assigned port
+    const server = new ServerSocket(-1, true, -1);
+    ok(server, `Launched WebSocket server on port ${server.port}`);
+
+    let input, output;
+
+    server.asyncListen({
+      async onSocketAccepted(socket, transport) {
+        info("Accepted incoming connection");
+        input = transport.openInputStream(0, 0, 0);
+        output = transport.openOutputStream(0, 0, 0);
+
+        // Perform the WebSocket handshake
+        const webSocket = await WebSocketServer.accept(transport, input, output);
+
+        // Echo the received message back to the sender
+        webSocket.onmessage = ({ data }) => {
+          info("Server received message, echoing back");
+          webSocket.send(data);
+        };
+      },
+
+      onStopListening(socket, status) {
+        info(`Server stopped listening with status: ${status}`);
+      },
+    });
+
+    SimpleTest.registerCleanupFunction(() => {
+      server.close();
+    });
+
+    // Create client connection
+    const client = await new Promise((resolve, reject) => {
+      const socket = new WebSocket(`ws://localhost:${server.port}`);
+      socket.onopen = () => resolve(socket);
+      socket.onerror = reject;
+    });
+    ok(client, `Created WebSocket connection to port ${server.port}`);
+
+    // Create a promise that resolves when the WebSocket closes
+    const closed = new Promise(resolve => {
+      client.onclose = resolve;
+    });
+
+    // Send a message
+    const message = "hello there";
+    client.send(message);
+    info("Sent a message to server");
+    // Check that it was echoed
+    const echoedMessage = await new Promise((resolve, reject) => {
+      client.onmessage = ({ data }) => resolve(data);
+      client.onerror = reject;
+    });
+
+    is(echoedMessage, message, "Echoed message matches");
+
+    // Close the connection
+    client.close();
+    await closed;
+
+    // Prevent leaking the streams by closing them before test ends
+    input.close();
+    output.close();
+  });
+};
+</script>
+</body>
+</html>