diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 82588852d47..b69234ce117 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -151,7 +151,6 @@ prefs:"layout.writing-mode.enabled" == iframe/size_attributes_vertical_writing_m
== jpeg_normal.html jpeg_ref.html
== jpeg_progressive.html jpeg_ref.html
== last_child_pseudo_a.html last_child_pseudo_b.html
-== last_of_type_pseudo_a.html last_of_type_pseudo_b.html
== legacy_cellspacing_attribute_a.html border_spacing_ref.html
== legacy_td_width_attribute_a.html legacy_td_width_attribute_ref.html
== legacy_th_width_attribute_a.html legacy_td_width_attribute_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 131aab0e72d..716629c67c2 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -791,6 +791,18 @@
"url": "/_mozilla/css/jumpiness_a.html"
}
],
+ "css/last_of_type_pseudo_a.html": [
+ {
+ "path": "css/last_of_type_pseudo_a.html",
+ "references": [
+ [
+ "/_mozilla/css/last_of_type_pseudo_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/last_of_type_pseudo_a.html"
+ }
+ ],
"css/layerization_z_order_a.html": [
{
"path": "css/layerization_z_order_a.html",
@@ -4116,6 +4128,18 @@
"url": "/_mozilla/css/jumpiness_a.html"
}
],
+ "css/last_of_type_pseudo_a.html": [
+ {
+ "path": "css/last_of_type_pseudo_a.html",
+ "references": [
+ [
+ "/_mozilla/css/last_of_type_pseudo_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/last_of_type_pseudo_a.html"
+ }
+ ],
"css/layerization_z_order_a.html": [
{
"path": "css/layerization_z_order_a.html",
diff --git a/tests/ref/last_of_type_pseudo_a.html b/tests/wpt/mozilla/tests/css/last_of_type_pseudo_a.html
similarity index 95%
rename from tests/ref/last_of_type_pseudo_a.html
rename to tests/wpt/mozilla/tests/css/last_of_type_pseudo_a.html
index b0046f64c82..97bbe0423af 100644
--- a/tests/ref/last_of_type_pseudo_a.html
+++ b/tests/wpt/mozilla/tests/css/last_of_type_pseudo_a.html
@@ -1,6 +1,7 @@
+
:last-of-type test