diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 4de8d033368..177dba55890 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -346,7 +346,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
== transform_3d.html transform_3d_ref.html
== transform_optimization.html transform_optimization_ref.html
== transform_simple_a.html transform_simple_ref.html
-== transform_skew_a.html transform_skew_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 cec0c584107..e96d29688f7 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/transform_skew_a.html": [
+ {
+ "path": "css/transform_skew_a.html",
+ "references": [
+ [
+ "/_mozilla/css/transform_skew_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/transform_skew_a.html"
+ }
+ ],
"css/transform_stacking_context_a.html": [
{
"path": "css/transform_stacking_context_a.html",
@@ -2036,6 +2048,18 @@
"url": "/_mozilla/css/stacking_context_rtl.html"
}
],
+ "css/transform_skew_a.html": [
+ {
+ "path": "css/transform_skew_a.html",
+ "references": [
+ [
+ "/_mozilla/css/transform_skew_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/transform_skew_a.html"
+ }
+ ],
"css/transform_stacking_context_a.html": [
{
"path": "css/transform_stacking_context_a.html",
diff --git a/tests/ref/transform_skew_a.html b/tests/wpt/mozilla/tests/css/transform_skew_a.html
similarity index 92%
rename from tests/ref/transform_skew_a.html
rename to tests/wpt/mozilla/tests/css/transform_skew_a.html
index 72ca4790880..5b2dde5d3d0 100644
--- a/tests/ref/transform_skew_a.html
+++ b/tests/wpt/mozilla/tests/css/transform_skew_a.html
@@ -1,6 +1,7 @@
+