diff --git a/.dprint.json b/.dprint.json
index b8af9469f4..07124d6625 100644
--- a/.dprint.json
+++ b/.dprint.json
@@ -13,7 +13,9 @@
     "associations": "**/*.rs",
     "rustfmt": "rustfmt --config imports_granularity=item"
   },
-  "includes": ["**/*.{ts,tsx,js,jsx,json,md,toml,rs}"],
+  "includes": [
+    "**/*.{ts,tsx,js,jsx,json,md,toml,rs}"
+  ],
   "excludes": [
     ".cargo_home",
     ".git",
@@ -48,7 +50,8 @@
     "tools/node_compat/TODO.md",
     "tools/node_compat/versions",
     "tools/wpt/expectation.json",
-    "tools/wpt/manifest.json"
+    "tools/wpt/manifest.json",
+    "ext/websocket/autobahn/reports"
   ],
   "plugins": [
     "https://plugins.dprint.dev/typescript-0.84.2.wasm",
diff --git a/.github/workflows/ci.generate.ts b/.github/workflows/ci.generate.ts
index ea9f93bc1c..b5fa91afb6 100755
--- a/.github/workflows/ci.generate.ts
+++ b/.github/workflows/ci.generate.ts
@@ -642,6 +642,15 @@ const ci = {
           run:
             'gsutil -h "Cache-Control: public, max-age=3600" cp ./target/release/*.zip gs://dl.deno.land/canary/$(git rev-parse HEAD)/',
         },
+        {
+          name: "Autobahn testsuite",
+          if: [
+            "matrix.job == 'test' && matrix.profile == 'release' &&",
+            "!startsWith(github.ref, 'refs/tags/') && startsWith(matrix.os, 'ubuntu')",
+          ].join("\n"),
+          run:
+            "target/release/deno run -A --unstable ext/websocket/autobahn/fuzzingclient.js",
+        },
         {
           name: "Test debug",
           if: [
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 205e5c069f..9f2c788c25 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -399,6 +399,11 @@ jobs:
         env:
           CLOUDSDK_PYTHON: '${{env.pythonLocation}}\python.exe'
         run: 'gsutil -h "Cache-Control: public, max-age=3600" cp ./target/release/*.zip gs://dl.deno.land/canary/$(git rev-parse HEAD)/'
+      - name: Autobahn testsuite
+        if: |-
+          !(github.event_name == 'pull_request' && matrix.skip_pr) && (matrix.job == 'test' && matrix.profile == 'release' &&
+          !startsWith(github.ref, 'refs/tags/') && startsWith(matrix.os, 'ubuntu'))
+        run: target/release/deno run -A --unstable ext/websocket/autobahn/fuzzingclient.js
       - name: Test debug
         if: |-
           !(github.event_name == 'pull_request' && matrix.skip_pr) && (matrix.job == 'test' && matrix.profile == 'debug' &&
diff --git a/.gitignore b/.gitignore
index 6f806b1433..a8738ea41d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,5 @@ gclient_config.py_entries
 # WPT generated cert files
 /tools/wpt/certs/index.txt*
 /tools/wpt/certs/serial*
+
+/ext/websocket/autobahn/reports
diff --git a/ext/websocket/autobahn/autobahn_server.js b/ext/websocket/autobahn/autobahn_server.js
new file mode 100644
index 0000000000..b5f399a5b6
--- /dev/null
+++ b/ext/websocket/autobahn/autobahn_server.js
@@ -0,0 +1,20 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+import { parse } from "../../../test_util/std/flags/mod.ts";
+
+const { port } = parse(Deno.args, {
+  number: ["port"],
+  default: {
+    port: 6969,
+  },
+});
+
+const { serve } = Deno;
+
+// A message-based WebSocket echo server.
+serve({ port }, (request) => {
+  const { socket, response } = Deno.upgradeWebSocket(request);
+  socket.onmessage = (event) => {
+    socket.send(event.data);
+  };
+  return response;
+});
diff --git a/ext/websocket/autobahn/fuzzingclient.js b/ext/websocket/autobahn/fuzzingclient.js
new file mode 100644
index 0000000000..8aa7166958
--- /dev/null
+++ b/ext/websocket/autobahn/fuzzingclient.js
@@ -0,0 +1,33 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+// deno-lint-ignore-file
+
+import { $ } from "https://deno.land/x/dax@0.31.0/mod.ts";
+
+const pwd = new URL(".", import.meta.url).pathname;
+
+const AUTOBAHN_TESTSUITE_DOCKER =
+  "crossbario/autobahn-testsuite:0.8.2@sha256:5d4ba3aa7d6ab2fdbf6606f3f4ecbe4b66f205ce1cbc176d6cdf650157e52242";
+
+const self = Deno.execPath();
+$`${self} run -A --unstable ${pwd}/autobahn_server.js`.spawn();
+await $`docker run --name fuzzingserver	-v ${pwd}/fuzzingclient.json:/fuzzingclient.json:ro	-v ${pwd}/reports:/reports -p 9001:9001	--net=host --rm	${AUTOBAHN_TESTSUITE_DOCKER} wstest -m fuzzingclient -s fuzzingclient.json`
+  .cwd(pwd);
+
+const { deno_websocket } = JSON.parse(
+  Deno.readTextFileSync(`${pwd}/reports/servers/index.json`),
+);
+const result = Object.values(deno_websocket);
+
+function failed(name) {
+  return name != "OK" && name != "INFORMATIONAL" && name != "NON-STRICT";
+}
+
+const failedtests = result.filter((outcome) => failed(outcome.behavior));
+
+console.log(
+  `%c${result.length - failedtests.length} / ${result.length} tests OK`,
+  `color: ${failedtests.length == 0 ? "green" : "red"}`,
+);
+
+Deno.exit(failedtests.length == 0 ? 0 : 1);
diff --git a/ext/websocket/autobahn/fuzzingclient.json b/ext/websocket/autobahn/fuzzingclient.json
new file mode 100644
index 0000000000..fcee80c993
--- /dev/null
+++ b/ext/websocket/autobahn/fuzzingclient.json
@@ -0,0 +1,26 @@
+{
+  "outdir": "./reports/servers",
+  "servers": [
+    {
+      "agent": "deno_websocket",
+      "url": "ws://localhost:6969"
+    }
+  ],
+  "cases": [
+    "1.*",
+    "2.*",
+    "3.*",
+    "4.*",
+    "5.*",
+    "6.*",
+    "7.*",
+    "9.*",
+    "10.*"
+  ],
+  "exclude-cases": [
+    "11.*",
+    "12.*",
+    "13.*"
+  ],
+  "exclude-agent-cases": {}
+}