diff --git a/package.json b/package.json
index 6c4b6f4abfd..2519a2fb457 100644
--- a/package.json
+++ b/package.json
@@ -84,7 +84,7 @@
     "test:tdd": "tap test/*.js test/diagnostics-channel/*.js -w",
     "test:typescript": "node scripts/verifyVersion.js 14 || tsd && tsc --skipLibCheck test/imports/undici-import.ts",
     "test:websocket": "node scripts/verifyVersion.js 18 || tap test/websocket/*.js",
-    "test:wpt": "node scripts/verifyVersion 18 || (node test/wpt/start-fetch.mjs && node test/wpt/start-FileAPI.mjs && node test/wpt/start-mimesniff.mjs && node test/wpt/start-xhr.mjs && node --no-warnings test/wpt/start-websockets.mjs)",
+    "test:wpt": "node scripts/verifyVersion 18 || (node test/wpt/start-fetch.mjs && node test/wpt/start-FileAPI.mjs && node test/wpt/start-mimesniff.mjs && node test/wpt/start-xhr.mjs && node --no-warnings --expose-internals test/wpt/start-websockets.mjs)",
     "coverage": "nyc --reporter=text --reporter=html npm run test",
     "coverage:ci": "nyc --reporter=lcov npm run test",
     "bench": "PORT=3042 concurrently -k -s first npm:bench:server npm:bench:run",
diff --git a/test/wpt/start-websockets.mjs b/test/wpt/start-websockets.mjs
index 73fd945c4d6..29c9e676d3f 100644
--- a/test/wpt/start-websockets.mjs
+++ b/test/wpt/start-websockets.mjs
@@ -3,9 +3,18 @@ import { join } from 'path'
 import { fileURLToPath } from 'url'
 import { fork } from 'child_process'
 import { on } from 'events'
+import options from 'internal/options'
 
 const { WPT_REPORT } = process.env
 
+function isGlobalAvailable () {
+  if (typeof WebSocket !== 'undefined') {
+    return true
+  }
+
+  return typeof options.getOptionValue('--experimental-websocket') === 'boolean'
+}
+
 if (process.env.CI) {
   // TODO(@KhafraDev): figure out *why* these tests are flaky in the CI.
   // process.exit(0)
@@ -22,7 +31,7 @@ child.on('exit', (code) => process.exit(code))
 for await (const [message] of on(child, 'message')) {
   if (message.server) {
     const runner = new WPTRunner('websockets', message.server, {
-      appendReport: !!WPT_REPORT,
+      appendReport: !!WPT_REPORT && isGlobalAvailable(),
       reportPath: WPT_REPORT
     })
     runner.run()