diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 302d75e04aa..48d43f7cc48 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -272,7 +272,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
== pre_ignorable_whitespace_a.html pre_ignorable_whitespace_ref.html
== pre_with_tab.html pre_with_tab_ref.html
== pseudo_content_with_layers.html pseudo_content_with_layers_ref.html
-== pseudo_element_a.html pseudo_element_b.html
== root_display_inline_a.html root_display_ref.html
== root_display_without_style_a.html root_display_ref.html
# text_decoration_propagation_a.html text_decoration_propagation_b.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index d1154638e4a..400bd0c3dcd 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -683,6 +683,18 @@
"url": "/_mozilla/css/flex_nochild.html"
}
],
+ "css/pseudo_element_a.html": [
+ {
+ "path": "css/pseudo_element_a.html",
+ "references": [
+ [
+ "/_mozilla/css/pseudo_element_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/pseudo_element_a.html"
+ }
+ ],
"css/pseudo_inherit.html": [
{
"path": "css/pseudo_inherit.html",
@@ -3000,6 +3012,18 @@
"url": "/_mozilla/css/flex_nochild.html"
}
],
+ "css/pseudo_element_a.html": [
+ {
+ "path": "css/pseudo_element_a.html",
+ "references": [
+ [
+ "/_mozilla/css/pseudo_element_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/pseudo_element_a.html"
+ }
+ ],
"css/pseudo_inherit.html": [
{
"path": "css/pseudo_inherit.html",
diff --git a/tests/ref/pseudo_element_a.html b/tests/wpt/mozilla/tests/css/pseudo_element_a.html
similarity index 93%
rename from tests/ref/pseudo_element_a.html
rename to tests/wpt/mozilla/tests/css/pseudo_element_a.html
index 4700d0e593a..e6bb2186f92 100644
--- a/tests/ref/pseudo_element_a.html
+++ b/tests/wpt/mozilla/tests/css/pseudo_element_a.html
@@ -1,6 +1,7 @@
+