diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index ff3987364b5..a3e5cb09fc8 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -11,7 +11,6 @@ fragment=top != ../html/acid2.html acid2_ref.html
== acid1_a.html acid1_b.html
== acid2_noscroll.html acid2_ref_broken.html
-== alpha_png_a.html alpha_png_b.html
== anon_block_inherit_a.html anon_block_inherit_b.html
flaky_cpu == append_style_a.html append_style_b.html
== attr_exists_selector.html attr_exists_selector_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 298eb9efa40..66b4d835485 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -147,6 +147,18 @@
"url": "/_mozilla/css/alpha_gif_a.html"
}
],
+ "css/alpha_png_a.html": [
+ {
+ "path": "css/alpha_png_a.html",
+ "references": [
+ [
+ "/_mozilla/css/alpha_png_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/alpha_png_a.html"
+ }
+ ],
"css/background.html": [
{
"path": "css/background.html",
@@ -1088,6 +1100,18 @@
"url": "/_mozilla/css/alpha_gif_a.html"
}
],
+ "css/alpha_png_a.html": [
+ {
+ "path": "css/alpha_png_a.html",
+ "references": [
+ [
+ "/_mozilla/css/alpha_png_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/alpha_png_a.html"
+ }
+ ],
"css/background.html": [
{
"path": "css/background.html",
diff --git a/tests/ref/alpha_png_a.html b/tests/wpt/mozilla/tests/css/alpha_png_a.html
similarity index 80%
rename from tests/ref/alpha_png_a.html
rename to tests/wpt/mozilla/tests/css/alpha_png_a.html
index 10abc613fb6..6c718e7b06c 100644
--- a/tests/ref/alpha_png_a.html
+++ b/tests/wpt/mozilla/tests/css/alpha_png_a.html
@@ -2,6 +2,7 @@
Kaboom
+