--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -130955,16 +130955,22 @@
     ]
    ],
    "webdriver/util/cleanup.py": [
     [
      "/webdriver/util/cleanup.py",
      {}
     ]
    ],
+   "webdriver/util/document.py": [
+    [
+     "/webdriver/util/document.py",
+     {}
+    ]
+   ],
    "webdriver/util/http_request.py": [
     [
      "/webdriver/util/http_request.py",
      {}
     ]
    ]
   }
  },
@@ -208153,37 +208159,41 @@
    "0d244bffe67ef57be68aad99f1cbc7440ff80e27",
    "support"
   ],
   "webdriver/actions/support/test_actions_wdspec.html": [
    "63b5de5ab6c7a00717663a18c3b4d79857ee2136",
    "support"
   ],
   "webdriver/conftest.py": [
-   "0096317addcf73326f6df05847659d637ae6910e",
+   "39ba7649c437b50bb97d766561e4bd5a110f6459",
    "wdspec"
   ],
   "webdriver/contexts.py": [
    "302a1a0cb246aef74f2c1d961a210d9de7e366c5",
    "wdspec"
   ],
   "webdriver/interface.html": [
    "d783d0dd370f58b264ef238d8da5cd8601dc3c7f",
    "testharness"
   ],
   "webdriver/navigation.py": [
-   "8a0dd2bc5cf9c734ceebcd1a11431482c944a668",
+   "2957d1203b508ca7dfe5e22d574e048b2bd2d934",
    "wdspec"
   ],
   "webdriver/util/__init__.py": [
    "8910ee7d68dfff68460731ea37eb0d406d07862d",
    "support"
   ],
   "webdriver/util/cleanup.py": [
-   "1622ba96398dec13b5fa4214fe8a7f930a943c5f",
+   "e5868c6358d24100e0a90217769b42d6d025356b",
+   "wdspec"
+  ],
+  "webdriver/util/document.py": [
+   "59e192e946316a9a824a3a322c7bd5e7c2f99f29",
    "wdspec"
   ],
   "webdriver/util/http_request.py": [
    "01c4b525c27f77d253c75031a9cee3f17aca8df0",
    "wdspec"
   ],
   "webgl/OWNERS": [
    "f8e0703fe2cc88edd21ef2c94fcb2e1a8889f5ae",

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/tests/webdriver/util/document.py
@@ -0,0 +1,4 @@
+import urllib
+
+def inline(doc):
+    return "data:text/html;charset=utf-8,%s" % urllib.quote(doc)