diff --git a/tests/wpt/urlpatterntestdata.json b/tests/wpt/urlpatterntestdata.json
index ee1003899..2ae0a4963 100644
--- a/tests/wpt/urlpatterntestdata.json
+++ b/tests/wpt/urlpatterntestdata.json
@@ -3126,5 +3126,33 @@
   {
     "pattern": ["(\\H):"],
     "expected_obj": "error"
+  },
+  {
+    "pattern": [
+      {"pathname": "/:foo((?<x>a))"}
+    ],
+    "inputs": [
+      {"pathname": "/a"}
+    ],
+    "expected_match": {
+      "pathname": {
+        "input": "/a",
+        "groups": {"foo": "a"}
+      }
+    }
+  },
+  {
+    "pattern": [
+      {"pathname": "/foo/(bar(?<x>baz))"}
+    ],
+    "inputs": [
+      {"pathname": "/foo/barbaz"}
+    ],
+    "expected_match": {
+      "pathname": {
+        "input": "/foo/barbaz",
+        "groups": {"0": "barbaz"}
+      }
+    }
   }
 ]