diff --git a/test/parallel/test-url-format-whatwg.js b/test/parallel/test-url-format-whatwg.js
index 9c86a7ae2c6910..d1f0e0bcbddec2 100644
--- a/test/parallel/test-url-format-whatwg.js
+++ b/test/parallel/test-url-format-whatwg.js
@@ -7,16 +7,16 @@ if (!common.hasIntl)
 const assert = require('assert');
 const url = require('url');
 
-const myURL = new URL('http://xn--lck1c3crb1723bpq4a.com/a?a=b#c');
+const myURL = new URL('http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c');
 
 assert.strictEqual(
   url.format(myURL),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
 );
 
 assert.strictEqual(
   url.format(myURL, {}),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
 );
 
 {
@@ -36,82 +36,107 @@ assert.strictEqual(
 // Any falsy value other than undefined will be treated as false.
 // Any truthy value will be treated as true.
 
+assert.strictEqual(
+  url.format(myURL, { auth: false }),
+  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+);
+
+assert.strictEqual(
+  url.format(myURL, { auth: '' }),
+  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+);
+
+assert.strictEqual(
+  url.format(myURL, { auth: 0 }),
+  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+);
+
+assert.strictEqual(
+  url.format(myURL, { auth: 1 }),
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+);
+
+assert.strictEqual(
+  url.format(myURL, { auth: {} }),
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+);
+
 assert.strictEqual(
   url.format(myURL, { fragment: false }),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b'
 );
 
 assert.strictEqual(
   url.format(myURL, { fragment: '' }),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b'
 );
 
 assert.strictEqual(
   url.format(myURL, { fragment: 0 }),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b'
 );
 
 assert.strictEqual(
   url.format(myURL, { fragment: 1 }),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { fragment: {} }),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { search: false }),
-  'http://xn--lck1c3crb1723bpq4a.com/a#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { search: '' }),
-  'http://xn--lck1c3crb1723bpq4a.com/a#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { search: 0 }),
-  'http://xn--lck1c3crb1723bpq4a.com/a#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { search: 1 }),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { search: {} }),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { unicode: true }),
-  'http://理容ナカムラ.com/a?a=b#c'
+  'http://user:pass@理容ナカムラ.com/a?a=b#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { unicode: 1 }),
-  'http://理容ナカムラ.com/a?a=b#c'
+  'http://user:pass@理容ナカムラ.com/a?a=b#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { unicode: {} }),
-  'http://理容ナカムラ.com/a?a=b#c'
+  'http://user:pass@理容ナカムラ.com/a?a=b#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { unicode: false }),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
 );
 
 assert.strictEqual(
   url.format(myURL, { unicode: 0 }),
-  'http://xn--lck1c3crb1723bpq4a.com/a?a=b#c'
+  'http://user:pass@xn--lck1c3crb1723bpq4a.com/a?a=b#c'
 );
 
 assert.strictEqual(
-  url.format(new URL('http://xn--0zwm56d.com:8080/path'), { unicode: true }),
-  'http://测试.com:8080/path'
+  url.format(new URL('http://user:pass@xn--0zwm56d.com:8080/path'), { unicode: true }),
+  'http://user:pass@测试.com:8080/path'
 );