diff --git a/test/parallel/test-url-is-url.js b/test/parallel/test-url-is-url.js
new file mode 100644
index 00000000000000..6bb8a1595df2a0
--- /dev/null
+++ b/test/parallel/test-url-is-url.js
@@ -0,0 +1,16 @@
+// Flags: --expose-internals
+'use strict';
+
+require('../common');
+
+const { URL, parse } = require('url');
+const assert = require('assert');
+const { isURL } = require('internal/url');
+
+assert.strictEqual(isURL(new URL('https://www.nodejs.org')), true);
+assert.strictEqual(isURL(parse('https://www.nodejs.org')), false);
+assert.strictEqual(isURL({
+  href: 'https://www.nodejs.org',
+  protocol: 'https:',
+  path: '/',
+}), false);