diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 12b0fc539f7..30b5ca2eafc 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -141,7 +141,6 @@ prefs:"layout.writing-mode.enabled" == iframe/size_attributes_vertical_writing_m
== inline_margin_multiple_fragments_a.html inline_margin_multiple_fragments_ref.html
== inline_whitespace_a.html inline_whitespace_ref.html
== inline_whitespace_b.html inline_whitespace_ref.html
-== input_button_margins_a.html input_button_margins_ref.html
!= input_height_a.html input_height_ref.html
!= inset_blackborder.html blackborder_ref.html
== jpeg_normal.html jpeg_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 10052f2d268..7b6887c13a9 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -791,6 +791,18 @@
"url": "/_mozilla/css/inline_text_align_a.html"
}
],
+ "css/input_button_margins_a.html": [
+ {
+ "path": "css/input_button_margins_a.html",
+ "references": [
+ [
+ "/_mozilla/css/input_button_margins_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/input_button_margins_a.html"
+ }
+ ],
"css/input_button_size_a.html": [
{
"path": "css/input_button_size_a.html",
@@ -4272,6 +4284,18 @@
"url": "/_mozilla/css/inline_text_align_a.html"
}
],
+ "css/input_button_margins_a.html": [
+ {
+ "path": "css/input_button_margins_a.html",
+ "references": [
+ [
+ "/_mozilla/css/input_button_margins_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/input_button_margins_a.html"
+ }
+ ],
"css/input_button_size_a.html": [
{
"path": "css/input_button_size_a.html",
diff --git a/tests/ref/input_button_margins_a.html b/tests/wpt/mozilla/tests/css/input_button_margins_a.html
similarity index 75%
rename from tests/ref/input_button_margins_a.html
rename to tests/wpt/mozilla/tests/css/input_button_margins_a.html
index a207daac455..37766fe87e5 100644
--- a/tests/ref/input_button_margins_a.html
+++ b/tests/wpt/mozilla/tests/css/input_button_margins_a.html
@@ -1,4 +1,5 @@
+