diff --git a/components/script/dom/url.rs b/components/script/dom/url.rs
index 40dda69f3cf..8f489902747 100644
--- a/components/script/dom/url.rs
+++ b/components/script/dom/url.rs
@@ -279,4 +279,9 @@ impl URLMethods for URL {
     fn SetUsername(&self, value: USVString) {
         UrlHelper::SetUsername(&mut self.url.borrow_mut(), value);
     }
+
+    // https://url.spec.whatwg.org/#dom-url-tojson
+    fn ToJSON(&self) -> USVString {
+        self.Href()
+    }
 }
diff --git a/components/script/dom/webidls/URL.webidl b/components/script/dom/webidls/URL.webidl
index c78185cafeb..334100a3bfe 100644
--- a/components/script/dom/webidls/URL.webidl
+++ b/components/script/dom/webidls/URL.webidl
@@ -24,6 +24,8 @@ interface URL {
   // static DOMString createFor(Blob blob);
   static void revokeObjectURL(DOMString url);
 
+  USVString toJSON();
+
   // This is only doing as well as gecko right now.
   // https://github.com/servo/servo/issues/7590 is on file for
   // adding attribute stringifier support.
diff --git a/tests/wpt/metadata/url/idlharness.any.js.ini b/tests/wpt/metadata/url/idlharness.any.js.ini
index 0d20ab439f2..e643f436ad8 100644
--- a/tests/wpt/metadata/url/idlharness.any.js.ini
+++ b/tests/wpt/metadata/url/idlharness.any.js.ini
@@ -2,18 +2,9 @@
   [idlharness]
     expected: FAIL
 
-  [URL interface: operation toJSON()]
-    expected: FAIL
-
   [URLSearchParams interface: operation sort()]
     expected: FAIL
 
-  [Test toJSON operation of URL]
-    expected: FAIL
-
-  [URL interface: new URL("http://foo") must inherit property "toJSON()" with the proper type]
-    expected: FAIL
-
   [Testing Symbol.iterator property of iterable interface URLSearchParams]
     expected: FAIL
 
@@ -28,18 +19,9 @@
   [idlharness]
     expected: FAIL
 
-  [URL interface: operation toJSON()]
-    expected: FAIL
-
   [URLSearchParams interface: operation sort()]
     expected: FAIL
 
-  [Test toJSON operation of URL]
-    expected: FAIL
-
-  [URL interface: new URL("http://foo") must inherit property "toJSON()" with the proper type]
-    expected: FAIL
-
   [Testing Symbol.iterator property of iterable interface URLSearchParams]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/url/url-tojson.any.js.ini b/tests/wpt/metadata/url/url-tojson.any.js.ini
deleted file mode 100644
index 9dc331d5844..00000000000
--- a/tests/wpt/metadata/url/url-tojson.any.js.ini
+++ /dev/null
@@ -1,9 +0,0 @@
-[url-tojson.any.html]
-  [url-tojson]
-    expected: FAIL
-
-
-[url-tojson.any.worker.html]
-  [url-tojson]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/url/url-tojson.html.ini b/tests/wpt/metadata/url/url-tojson.html.ini
deleted file mode 100644
index fcc7e20caa5..00000000000
--- a/tests/wpt/metadata/url/url-tojson.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[url-tojson.html]
-  type: testharness
-  [URL's toJSON()]
-    expected: FAIL
-