diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index a52e0f9feb4..436141455ed 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -61697,7 +61697,7 @@
    "testharness"
   ],
   "css/calc-serialization.html": [
-   "628597eb36bf21a1ec982c7f6935ee7949c62044",
+   "d0bcbd402cb78e704dabc7f1665d40ba163e30eb",
    "testharness"
   ],
   "css/canvas_as_block_element_a.html": [
diff --git a/tests/wpt/mozilla/tests/css/calc-serialization.html b/tests/wpt/mozilla/tests/css/calc-serialization.html
index b423557a1b8..f92de7338d3 100644
--- a/tests/wpt/mozilla/tests/css/calc-serialization.html
+++ b/tests/wpt/mozilla/tests/css/calc-serialization.html
@@ -3,20 +3,15 @@
 <title>CSS Values and Units: calc() serialization.</title>
 <link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@mozilla.com">
 <link rel="help" href="https://drafts.csswg.org/css-values/#calc-serialize">
+<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/1731">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
-<!-- FIXME(emilio): Upstream when spec stops being under discussion -->
 <div id="content"></div>
 <script>
-
-// NOTE(emilio): This intentionally doesn't test for order of percentages
-// because of:
-//
-// https://github.com/w3c/csswg-drafts/issues/1731
-
 test(function() {
   // specified -> expected
   var values = {
+    "calc(10px + 1vmin + 10%)": "calc(10% + 10px + 1vmin)",
     "calc(10px + 1vmin)": "calc(10px + 1vmin)",
     "calc(10px + 1em)": "calc(1em + 10px)",
     "calc(1vmin - 10px)": "calc(-10px + 1vmin)",