diff --git a/test/common/wpt.js b/test/common/wpt.js
index 59dbe26d2abdcb..4f2f39c8e595d2 100644
--- a/test/common/wpt.js
+++ b/test/common/wpt.js
@@ -280,7 +280,9 @@ class WPTRunner {
     sandbox.self = sandbox;
     // TODO(joyeecheung): we are not a window - work with the upstream to
     // add a new scope for us.
-    sandbox.document = {};  // Pretend we are Window
+
+    const { Worker } = require('worker_threads');
+    sandbox.DedicatedWorker = Worker;  // Pretend we are a Worker
     return context;
   }
 
diff --git a/test/wpt/test-whatwg-console.js b/test/wpt/test-whatwg-console.js
index 7b23fe8d3e619d..15fb80fc962a63 100644
--- a/test/wpt/test-whatwg-console.js
+++ b/test/wpt/test-whatwg-console.js
@@ -1,6 +1,6 @@
 'use strict';
 
-// Flags: --expose-internals
+// Flags: --expose-internals --experimental-worker
 
 require('../common');
 const { WPTRunner } = require('../common/wpt');
diff --git a/test/wpt/test-whatwg-url.js b/test/wpt/test-whatwg-url.js
index 8734452940e84e..fbbea2453203c3 100644
--- a/test/wpt/test-whatwg-url.js
+++ b/test/wpt/test-whatwg-url.js
@@ -1,6 +1,6 @@
 'use strict';
 
-// Flags: --expose-internals
+// Flags: --expose-internals --experimental-worker
 
 require('../common');
 const { WPTRunner } = require('../common/wpt');