diff --git a/url/url-tojson.any.js b/url/url-tojson.any.js
new file mode 100644
index 00000000000000..baee8548f1e8f6
--- /dev/null
+++ b/url/url-tojson.any.js
@@ -0,0 +1,4 @@
+test(() => {
+  const a = new URL('https://example.com/');
+  assert_equals(JSON.stringify(a), '"https://example.com/"');
+});
diff --git a/url/url-tojson.html b/url/url-tojson.html
deleted file mode 100644
index 3e8798c08b556e..00000000000000
--- a/url/url-tojson.html
+++ /dev/null
@@ -1,12 +0,0 @@
-<!doctype html>
-<meta charset=utf-8>
-<title>URL's toJSON()</title>
-<script src=/resources/testharness.js></script>
-<script src=/resources/testharnessreport.js></script>
-<div id=log></div>
-<script>
-test(() => {
-  const a = new URL("https://example.com/")
-  assert_equals(JSON.stringify(a), "\"https://example.com/\"")
-})
-</script>
