diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index acb8b2bdfa2..6c51dea1f11 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -324,7 +324,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
!= text_decoration_underline_subpx_a.html text_decoration_underline_subpx_ref.html
!= text_overflow_a.html text_overflow_ref.html
== text_transform_capitalize_a.html text_transform_capitalize_ref.html
-== transform_3d.html transform_3d_ref.html
flaky_cpu,prefs:"layout.writing-mode.enabled" == vertical-lr-blocks.html vertical-lr-blocks_ref.html
== viewport_meta.html viewport_rule_ref.html
resolution=800x600 == viewport_percentage_vmin_vmax.html viewport_percentage_vmin_vmax_a.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index fd0776d9b8d..feffcd02079 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -831,6 +831,18 @@
"url": "/_mozilla/css/text_transform_uppercase_a.html"
}
],
+ "css/transform_3d.html": [
+ {
+ "path": "css/transform_3d.html",
+ "references": [
+ [
+ "/_mozilla/css/transform_3d_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/transform_3d.html"
+ }
+ ],
"css/transform_optimization.html": [
{
"path": "css/transform_optimization.html",
@@ -2612,6 +2624,18 @@
"url": "/_mozilla/css/text_transform_uppercase_a.html"
}
],
+ "css/transform_3d.html": [
+ {
+ "path": "css/transform_3d.html",
+ "references": [
+ [
+ "/_mozilla/css/transform_3d_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/transform_3d.html"
+ }
+ ],
"css/transform_optimization.html": [
{
"path": "css/transform_optimization.html",
diff --git a/tests/ref/transform_3d.html b/tests/wpt/mozilla/tests/css/transform_3d.html
similarity index 98%
rename from tests/ref/transform_3d.html
rename to tests/wpt/mozilla/tests/css/transform_3d.html
index 2d2880c7d4d..ec4e26eef16 100644
--- a/tests/ref/transform_3d.html
+++ b/tests/wpt/mozilla/tests/css/transform_3d.html
@@ -1,6 +1,7 @@
+