diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index d1fb18ce968..44030abc877 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -35,7 +35,6 @@ flaky_cpu == append_style_a.html append_style_b.html
== case-insensitive-font-family.html case-insensitive-font-family-ref.html
== clear_generated_content_table_a.html clear_generated_content_table_ref.html
== clip_a.html clip_ref.html
-== counters_nested_a.html counters_nested_ref.html
== counters_simple_a.html counters_simple_ref.html
== empty_cells_a.html empty_cells_ref.html
== external_media_query_link.html external_media_query_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 1e272b695a7..65352521e4c 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -803,6 +803,18 @@
"url": "/_mozilla/css/class-namespaces.html"
}
],
+ "css/counters_nested_a.html": [
+ {
+ "path": "css/counters_nested_a.html",
+ "references": [
+ [
+ "/_mozilla/css/counters_nested_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/counters_nested_a.html"
+ }
+ ],
"css/data_img_a.html": [
{
"path": "css/data_img_a.html",
@@ -5052,6 +5064,18 @@
"url": "/_mozilla/css/class-namespaces.html"
}
],
+ "css/counters_nested_a.html": [
+ {
+ "path": "css/counters_nested_a.html",
+ "references": [
+ [
+ "/_mozilla/css/counters_nested_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/counters_nested_a.html"
+ }
+ ],
"css/data_img_a.html": [
{
"path": "css/data_img_a.html",
diff --git a/tests/ref/counters_nested_a.html b/tests/wpt/mozilla/tests/css/counters_nested_a.html
similarity index 92%
rename from tests/ref/counters_nested_a.html
rename to tests/wpt/mozilla/tests/css/counters_nested_a.html
index 39baa0ac16b..bff0efd91b7 100644
--- a/tests/ref/counters_nested_a.html
+++ b/tests/wpt/mozilla/tests/css/counters_nested_a.html
@@ -1,6 +1,7 @@
+