diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 7f21c978d87..4d4d2fe99c9 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -297,7 +297,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
 == rtl_simple.html rtl_simple_ref.html
 == rtl_table_a.html rtl_table_ref.html
 == servo_center_a.html servo_center_ref.html
-== setattribute_id_restyle_a.html setattribute_id_restyle_b.html
 # text_decoration_propagation_a.html text_decoration_propagation_b.html
 != text_decoration_smoke_a.html text_decoration_smoke_ref.html
 != text_decoration_underline_subpx_a.html text_decoration_underline_subpx_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 6775cc28f2b..e326da56711 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -579,6 +579,18 @@
             "url": "/_mozilla/css/flex_nochild.html"
           }
         ],
+        "css/setattribute_id_restyle_a.html": [
+          {
+            "path": "css/setattribute_id_restyle_a.html",
+            "references": [
+              [
+                "/_mozilla/css/setattribute_id_restyle_b.html",
+                "=="
+              ]
+            ],
+            "url": "/_mozilla/css/setattribute_id_restyle_a.html"
+          }
+        ],
         "css/setpropertypriority.html": [
           {
             "path": "css/setpropertypriority.html",
@@ -2636,6 +2648,18 @@
           "url": "/_mozilla/css/flex_nochild.html"
         }
       ],
+      "css/setattribute_id_restyle_a.html": [
+        {
+          "path": "css/setattribute_id_restyle_a.html",
+          "references": [
+            [
+              "/_mozilla/css/setattribute_id_restyle_b.html",
+              "=="
+            ]
+          ],
+          "url": "/_mozilla/css/setattribute_id_restyle_a.html"
+        }
+      ],
       "css/setpropertypriority.html": [
         {
           "path": "css/setpropertypriority.html",
diff --git a/tests/ref/setattribute_id_restyle_a.html b/tests/wpt/mozilla/tests/css/setattribute_id_restyle_a.html
similarity index 81%
rename from tests/ref/setattribute_id_restyle_a.html
rename to tests/wpt/mozilla/tests/css/setattribute_id_restyle_a.html
index 469ce797db7..68d6c02a375 100644
--- a/tests/ref/setattribute_id_restyle_a.html
+++ b/tests/wpt/mozilla/tests/css/setattribute_id_restyle_a.html
@@ -1,3 +1,4 @@
+<link rel='match' href='setattribute_id_restyle_b.html'>
 <style>
     #foo { background-color: #FF0000; }
 </style>
diff --git a/tests/ref/setattribute_id_restyle_b.html b/tests/wpt/mozilla/tests/css/setattribute_id_restyle_b.html
similarity index 100%
rename from tests/ref/setattribute_id_restyle_b.html
rename to tests/wpt/mozilla/tests/css/setattribute_id_restyle_b.html