diff --git a/lib/internal/url.js b/lib/internal/url.js
index 4d9e978f8305ce..3035c9c1979ed1 100644
--- a/lib/internal/url.js
+++ b/lib/internal/url.js
@@ -617,7 +617,7 @@ function onParseHashComplete(flags, protocol, username, password,
 }
 
 class URL {
-  constructor(input, base) {
+  constructor(input, base = undefined) {
     // toUSVString is not needed.
     input = `${input}`;
     let base_context;
diff --git a/test/common/wpt.js b/test/common/wpt.js
index 3e2f8151a6c20b..52f48685f315e3 100644
--- a/test/common/wpt.js
+++ b/test/common/wpt.js
@@ -288,6 +288,7 @@ class WPTRunner {
     this.resource = new ResourceLoader(path);
 
     this.flags = [];
+    this.dummyGlobalThisScript = null;
     this.initScript = null;
 
     this.status = new StatusLoader(path);
@@ -318,6 +319,43 @@ class WPTRunner {
     this.initScript = script;
   }
 
+  get fullInitScript() {
+    if (this.initScript === null && this.dummyGlobalThisScript === null) {
+      return null;
+    }
+
+    if (this.initScript === null) {
+      return this.dummyGlobalThisScript;
+    } else if (this.dummyGlobalThisScript === null) {
+      return this.initScript;
+    }
+
+    return `${this.fullInitScript}\n\n//===\n${this.initScript}`;
+  }
+
+  /**
+   * Pretend the runner is run in `name`'s environment (globalThis).
+   * @param {'Window'} name
+   * @see {@link https://github.com/nodejs/node/blob/24673ace8ae196bd1c6d4676507d6e8c94cf0b90/test/fixtures/wpt/resources/idlharness.js#L654-L671}
+   */
+  pretendGlobalThisAs(name) {
+    switch (name) {
+      case 'Window': {
+        this.dummyGlobalThisScript =
+          'global.Window = Object.getPrototypeOf(globalThis).constructor;';
+        break;
+      }
+
+      // TODO(XadillaX): implement `ServiceWorkerGlobalScope`,
+      // `DedicateWorkerGlobalScope`, etc.
+      //
+      // e.g. `ServiceWorkerGlobalScope` should implement dummy
+      // `addEventListener` and so on.
+
+      default: throw new Error(`Invalid globalThis type ${name}.`);
+    }
+  }
+
   // TODO(joyeecheung): work with the upstream to port more tests in .html
   // to .js.
   runJsTests() {
@@ -368,7 +406,7 @@ class WPTRunner {
           testRelativePath: relativePath,
           wptRunner: __filename,
           wptPath: this.path,
-          initScript: this.initScript,
+          initScript: this.fullInitScript,
           harness: {
             code: fs.readFileSync(harnessPath, 'utf8'),
             filename: harnessPath,
diff --git a/test/wpt/status/url.json b/test/wpt/status/url.json
index ab89356f82c805..36ff89e8e07d85 100644
--- a/test/wpt/status/url.json
+++ b/test/wpt/status/url.json
@@ -13,9 +13,6 @@
   "urlencoded-parser.any.js": {
     "fail": "missing Request and Response"
   },
-  "idlharness.any.js": {
-    "fail": "getter/setter names are wrong, etc."
-  },
   "urlsearchparams-constructor.any.js": {
     "fail": "FormData is not defined"
   },
@@ -30,5 +27,8 @@
   },
   "url-setters-a-area.window.js": {
     "skip": "already tested in url-setters.any.js"
+  },
+  "idlharness.any.js": {
+    "fail": "Fixed in a semver-major change: https://github.com/nodejs/node/pull/39752"
   }
 }
diff --git a/test/wpt/test-url.js b/test/wpt/test-url.js
index 4652bfd880cd76..0b731dbe89c608 100644
--- a/test/wpt/test-url.js
+++ b/test/wpt/test-url.js
@@ -15,4 +15,5 @@ runner.setInitScript(`
   global.DOMException = DOMException;
 `);
 
+runner.pretendGlobalThisAs('Window');
 runner.runJsTests();