diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 350b75044c8..ece2890f2f5 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -213,7 +213,6 @@ flaky_cpu == linebreak_simple_a.html linebreak_simple_b.html
!= octicons_a.html octicons_ref.html
== ol_japanese_iroha_a.html ol_japanese_iroha_ref.html
!= ol_japanese_iroha_bullet_styles.html ol_japanese_iroha_ref.html
-== ol_simple_a.html ol_simple_ref.html
== only_child_pseudo_a.html only_child_pseudo_b.html
== outline_offset_a.html outline_offset_ref.html
!= outset_blackborder.html blackborder_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 70e2148e682..3f9e66f226a 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/ol_simple_a.html": [
+ {
+ "path": "css/ol_simple_a.html",
+ "references": [
+ [
+ "/_mozilla/css/ol_simple_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/ol_simple_a.html"
+ }
+ ],
"css/only_of_type_pseudo_a.html": [
{
"path": "css/only_of_type_pseudo_a.html",
@@ -3480,6 +3492,18 @@
"url": "/_mozilla/css/flex_nochild.html"
}
],
+ "css/ol_simple_a.html": [
+ {
+ "path": "css/ol_simple_a.html",
+ "references": [
+ [
+ "/_mozilla/css/ol_simple_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/ol_simple_a.html"
+ }
+ ],
"css/only_of_type_pseudo_a.html": [
{
"path": "css/only_of_type_pseudo_a.html",
diff --git a/tests/ref/ol_simple_a.html b/tests/wpt/mozilla/tests/css/ol_simple_a.html
similarity index 82%
rename from tests/ref/ol_simple_a.html
rename to tests/wpt/mozilla/tests/css/ol_simple_a.html
index e63c00c4ceb..0f23526acb5 100644
--- a/tests/ref/ol_simple_a.html
+++ b/tests/wpt/mozilla/tests/css/ol_simple_a.html
@@ -1,6 +1,7 @@
+