diff --git a/test/parallel/test-whatwg-url-constructor.js b/test/parallel/test-whatwg-url-constructor.js
index c2773b9af105fb..e1fd497b0c664f 100644
--- a/test/parallel/test-whatwg-url-constructor.js
+++ b/test/parallel/test-whatwg-url-constructor.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 const common = require('../common');
 const path = require('path');
diff --git a/test/parallel/test-whatwg-url-domainto.js b/test/parallel/test-whatwg-url-domainto.js
index 13ff9968705b98..3f230f8d08dddb 100644
--- a/test/parallel/test-whatwg-url-domainto.js
+++ b/test/parallel/test-whatwg-url-domainto.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 const common = require('../common');
 
diff --git a/test/parallel/test-whatwg-url-historical.js b/test/parallel/test-whatwg-url-historical.js
index 452c14fc77a319..d5fcc65be9f8b3 100644
--- a/test/parallel/test-whatwg-url-historical.js
+++ b/test/parallel/test-whatwg-url-historical.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 const common = require('../common');
 const URL = require('url').URL;
diff --git a/test/parallel/test-whatwg-url-inspect.js b/test/parallel/test-whatwg-url-inspect.js
index 8db1a20e5be152..735c34a281243b 100644
--- a/test/parallel/test-whatwg-url-inspect.js
+++ b/test/parallel/test-whatwg-url-inspect.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-origin.js b/test/parallel/test-whatwg-url-origin.js
index c7126585e170e7..2011781a0aadbd 100644
--- a/test/parallel/test-whatwg-url-origin.js
+++ b/test/parallel/test-whatwg-url-origin.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 const common = require('../common');
 const path = require('path');
diff --git a/test/parallel/test-whatwg-url-parsing.js b/test/parallel/test-whatwg-url-parsing.js
index 0e8f3b6d77cb56..f892d59a018270 100644
--- a/test/parallel/test-whatwg-url-parsing.js
+++ b/test/parallel/test-whatwg-url-parsing.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-properties.js b/test/parallel/test-whatwg-url-properties.js
index c5d60229a9f2c1..0c8fa1588a1ff3 100644
--- a/test/parallel/test-whatwg-url-properties.js
+++ b/test/parallel/test-whatwg-url-properties.js
@@ -1,3 +1,4 @@
+// whatwg test should not be modified.
 // Flags: --expose-internals
 'use strict';
 
diff --git a/test/parallel/test-whatwg-url-searchparams-append.js b/test/parallel/test-whatwg-url-searchparams-append.js
index 9d1eaceba1223c..264194767a4f9f 100644
--- a/test/parallel/test-whatwg-url-searchparams-append.js
+++ b/test/parallel/test-whatwg-url-searchparams-append.js
@@ -1,3 +1,4 @@
+// whatwg test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-constructor.js b/test/parallel/test-whatwg-url-searchparams-constructor.js
index e22ceec57083d0..735de968d76b43 100644
--- a/test/parallel/test-whatwg-url-searchparams-constructor.js
+++ b/test/parallel/test-whatwg-url-searchparams-constructor.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-delete.js b/test/parallel/test-whatwg-url-searchparams-delete.js
index bb3fcc9549c411..10134c92e5b629 100644
--- a/test/parallel/test-whatwg-url-searchparams-delete.js
+++ b/test/parallel/test-whatwg-url-searchparams-delete.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-entries.js b/test/parallel/test-whatwg-url-searchparams-entries.js
index 1dfcdb0338dffb..0d4bedf257b9e1 100644
--- a/test/parallel/test-whatwg-url-searchparams-entries.js
+++ b/test/parallel/test-whatwg-url-searchparams-entries.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-foreach.js b/test/parallel/test-whatwg-url-searchparams-foreach.js
index ea85da21a32a87..f48e03a04add0a 100644
--- a/test/parallel/test-whatwg-url-searchparams-foreach.js
+++ b/test/parallel/test-whatwg-url-searchparams-foreach.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-get.js b/test/parallel/test-whatwg-url-searchparams-get.js
index cc34373528cc1f..69fcacd5160c27 100644
--- a/test/parallel/test-whatwg-url-searchparams-get.js
+++ b/test/parallel/test-whatwg-url-searchparams-get.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-getall.js b/test/parallel/test-whatwg-url-searchparams-getall.js
index 9c060ecb6d97a0..d088095df548b8 100644
--- a/test/parallel/test-whatwg-url-searchparams-getall.js
+++ b/test/parallel/test-whatwg-url-searchparams-getall.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-has.js b/test/parallel/test-whatwg-url-searchparams-has.js
index fac4364081be88..6dca7856af2b80 100644
--- a/test/parallel/test-whatwg-url-searchparams-has.js
+++ b/test/parallel/test-whatwg-url-searchparams-has.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-inspect.js b/test/parallel/test-whatwg-url-searchparams-inspect.js
index 9a56543637dc55..3cdc931ded9de5 100644
--- a/test/parallel/test-whatwg-url-searchparams-inspect.js
+++ b/test/parallel/test-whatwg-url-searchparams-inspect.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-keys.js b/test/parallel/test-whatwg-url-searchparams-keys.js
index cbf0766bc2e6c4..a954844ede8a82 100644
--- a/test/parallel/test-whatwg-url-searchparams-keys.js
+++ b/test/parallel/test-whatwg-url-searchparams-keys.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-set.js b/test/parallel/test-whatwg-url-searchparams-set.js
index a630355b6e3178..c8ffe95b2c8573 100644
--- a/test/parallel/test-whatwg-url-searchparams-set.js
+++ b/test/parallel/test-whatwg-url-searchparams-set.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-sort.js b/test/parallel/test-whatwg-url-searchparams-sort.js
index 5bddc14d947d8f..76f0a88ff7066c 100644
--- a/test/parallel/test-whatwg-url-searchparams-sort.js
+++ b/test/parallel/test-whatwg-url-searchparams-sort.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-stringifier.js b/test/parallel/test-whatwg-url-searchparams-stringifier.js
index 327611bc68a8b9..9c559eee7b439c 100644
--- a/test/parallel/test-whatwg-url-searchparams-stringifier.js
+++ b/test/parallel/test-whatwg-url-searchparams-stringifier.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams-values.js b/test/parallel/test-whatwg-url-searchparams-values.js
index 96f1a0fddbfb9f..1acb356e18f842 100644
--- a/test/parallel/test-whatwg-url-searchparams-values.js
+++ b/test/parallel/test-whatwg-url-searchparams-values.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-searchparams.js b/test/parallel/test-whatwg-url-searchparams.js
index 5bb9cf407dc1e9..4b6afa711c5c49 100644
--- a/test/parallel/test-whatwg-url-searchparams.js
+++ b/test/parallel/test-whatwg-url-searchparams.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-setters.js b/test/parallel/test-whatwg-url-setters.js
index 253415dad6e5a9..85f793f728b495 100644
--- a/test/parallel/test-whatwg-url-setters.js
+++ b/test/parallel/test-whatwg-url-setters.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-tojson.js b/test/parallel/test-whatwg-url-tojson.js
index 20f2d183f2167f..c99a66830b391c 100644
--- a/test/parallel/test-whatwg-url-tojson.js
+++ b/test/parallel/test-whatwg-url-tojson.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 const common = require('../common');
diff --git a/test/parallel/test-whatwg-url-tostringtag.js b/test/parallel/test-whatwg-url-tostringtag.js
index 689056fd238dda..c7ea8afbeb1e71 100644
--- a/test/parallel/test-whatwg-url-tostringtag.js
+++ b/test/parallel/test-whatwg-url-tostringtag.js
@@ -1,3 +1,4 @@
+// whatwg url test should not be modified.
 'use strict';
 
 require('../common');