diff --git a/lib/web/websocket/connection.js b/lib/web/websocket/connection.js
index 3a9c649aaac..ce067f74d69 100644
--- a/lib/web/websocket/connection.js
+++ b/lib/web/websocket/connection.js
@@ -91,7 +91,7 @@ function establishWebSocketConnection (url, protocols, client, ws, onEstablish,
   // 9. Let permessageDeflate be a user-agent defined
   //    "permessage-deflate" extension header value.
   // https://github.com/mozilla/gecko-dev/blob/ce78234f5e653a5d3916813ff990f053510227bc/netwerk/protocol/websocket/WebSocketChannel.cpp#L2673
-  const permessageDeflate = options.node?.['client-extensions'] ?? ''
+  const permessageDeflate = 'permessage-deflate'
 
   // 10. Append (`Sec-WebSocket-Extensions`, permessageDeflate) to
   //     request’s header list.
diff --git a/lib/web/websocket/websocket.js b/lib/web/websocket/websocket.js
index a0e66f38d66..4243f6c5830 100644
--- a/lib/web/websocket/websocket.js
+++ b/lib/web/websocket/websocket.js
@@ -549,14 +549,6 @@ webidl.converters['DOMString or sequence<DOMString>'] = function (V, prefix, arg
   return webidl.converters.DOMString(V, prefix, argument)
 }
 
-webidl.converters.WebSocketInitNodeOptions = webidl.dictionaryConverter([
-  {
-    key: 'client-extensions',
-    converter: webidl.converters.DOMString,
-    defaultValue: () => ''
-  }
-])
-
 // This implements the proposal made in https://github.com/whatwg/websockets/issues/42
 webidl.converters.WebSocketInit = webidl.dictionaryConverter([
   {
@@ -572,11 +564,6 @@ webidl.converters.WebSocketInit = webidl.dictionaryConverter([
   {
     key: 'headers',
     converter: webidl.nullableConverter(webidl.converters.HeadersInit)
-  },
-  {
-    key: 'node',
-    converter: webidl.converters.WebSocketInitNodeOptions,
-    defaultValue: () => ({})
   }
 ])
 
diff --git a/test/autobahn/client.js b/test/autobahn/client.js
index a2c74522c71..41bf1d61063 100644
--- a/test/autobahn/client.js
+++ b/test/autobahn/client.js
@@ -6,25 +6,19 @@ let currentTest = 1
 let testCount
 
 const autobahnFuzzingserverUrl = process.env.FUZZING_SERVER_URL || 'ws://localhost:9001'
-const options = {
-  node: {
-    'client-extensions': 'permessage-deflate'
-  }
-}
 
 function nextTest () {
   let ws
 
   if (currentTest > testCount) {
-    ws = new WebSocket(`${autobahnFuzzingserverUrl}/updateReports?agent=undici`, options)
+    ws = new WebSocket(`${autobahnFuzzingserverUrl}/updateReports?agent=undici`)
     return
   }
 
   console.log(`Running test case ${currentTest}/${testCount}`)
 
   ws = new WebSocket(
-    `${autobahnFuzzingserverUrl}/runCase?case=${currentTest}&agent=undici`,
-    options
+    `${autobahnFuzzingserverUrl}/runCase?case=${currentTest}&agent=undici`
   )
   ws.addEventListener('message', (data) => {
     ws.send(data.data)
@@ -38,7 +32,7 @@ function nextTest () {
   })
 }
 
-const ws = new WebSocket(`${autobahnFuzzingserverUrl}/getCaseCount`, options)
+const ws = new WebSocket(`${autobahnFuzzingserverUrl}/getCaseCount`)
 ws.addEventListener('message', (data) => {
   testCount = parseInt(data.data)
 })