diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index c70666af324..757c7965cc0 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -348,7 +348,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
 == transform_simple_a.html transform_simple_ref.html
 == transform_skew_a.html transform_skew_ref.html
 == transform_stacking_context_a.html transform_stacking_context_ref.html
-== transition_calc.html transition_calc_ref.html
 flaky_cpu,prefs:"layout.writing-mode.enabled" == vertical-lr-blocks.html vertical-lr-blocks_ref.html
 == vertical_align_bottom_a.html vertical_align_bottom_ref.html
 == vertical_align_inline_block_a.html vertical_align_inline_block_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 0ba0b2ff4a4..344b26e79ca 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -603,6 +603,18 @@
             "url": "/_mozilla/css/stacking_context_rtl.html"
           }
         ],
+        "css/transition_calc.html": [
+          {
+            "path": "css/transition_calc.html",
+            "references": [
+              [
+                "/_mozilla/css/transition_calc_ref.html",
+                "=="
+              ]
+            ],
+            "url": "/_mozilla/css/transition_calc.html"
+          }
+        ],
         "css/upper_id_attr.html": [
           {
             "path": "css/upper_id_attr.html",
@@ -2012,6 +2024,18 @@
           "url": "/_mozilla/css/stacking_context_rtl.html"
         }
       ],
+      "css/transition_calc.html": [
+        {
+          "path": "css/transition_calc.html",
+          "references": [
+            [
+              "/_mozilla/css/transition_calc_ref.html",
+              "=="
+            ]
+          ],
+          "url": "/_mozilla/css/transition_calc.html"
+        }
+      ],
       "css/upper_id_attr.html": [
         {
           "path": "css/upper_id_attr.html",
diff --git a/tests/ref/transition_calc.html b/tests/wpt/mozilla/tests/css/transition_calc.html
similarity index 90%
rename from tests/ref/transition_calc.html
rename to tests/wpt/mozilla/tests/css/transition_calc.html
index 2497ddeed0c..8b7650450f6 100644
--- a/tests/ref/transition_calc.html
+++ b/tests/wpt/mozilla/tests/css/transition_calc.html
@@ -1,3 +1,4 @@
+<link rel='match' href='transition_calc_ref.html'>
 <style>
 .outer {
     width: 100px;
diff --git a/tests/ref/transition_calc_ref.html b/tests/wpt/mozilla/tests/css/transition_calc_ref.html
similarity index 100%
rename from tests/ref/transition_calc_ref.html
rename to tests/wpt/mozilla/tests/css/transition_calc_ref.html