diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index abdde4d7e5a..c70c9df3521 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -12,7 +12,6 @@ fragment=top != ../html/acid2.html acid2_ref.html
== acid1_a.html acid1_b.html
== acid2_noscroll.html acid2_ref_broken.html
flaky_cpu == append_style_a.html append_style_b.html
-== background_external_stylesheet.html background_ref.html
== background_image_a.html background_image_ref.html
== background_image_position_a.html background_image_position_ref.html
== background_none_a.html background_none_b.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 8d2a9c254e1..11039509443 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -219,6 +219,18 @@
"url": "/_mozilla/css/background_clip_a.html"
}
],
+ "css/background_external_stylesheet.html": [
+ {
+ "path": "css/background_external_stylesheet.html",
+ "references": [
+ [
+ "/_mozilla/css/background_rust_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/background_external_stylesheet.html"
+ }
+ ],
"css/class-namespaces.html": [
{
"path": "css/class-namespaces.html",
@@ -1220,6 +1232,18 @@
"url": "/_mozilla/css/background_clip_a.html"
}
],
+ "css/background_external_stylesheet.html": [
+ {
+ "path": "css/background_external_stylesheet.html",
+ "references": [
+ [
+ "/_mozilla/css/background_rust_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/background_external_stylesheet.html"
+ }
+ ],
"css/class-namespaces.html": [
{
"path": "css/class-namespaces.html",
diff --git a/tests/ref/background_external_stylesheet.html b/tests/wpt/mozilla/tests/css/background_external_stylesheet.html
similarity index 81%
rename from tests/ref/background_external_stylesheet.html
rename to tests/wpt/mozilla/tests/css/background_external_stylesheet.html
index 9465a1b4cae..779ee53213a 100644
--- a/tests/ref/background_external_stylesheet.html
+++ b/tests/wpt/mozilla/tests/css/background_external_stylesheet.html
@@ -3,6 +3,7 @@
+
diff --git a/tests/wpt/mozilla/tests/css/background_rust_ref.html b/tests/wpt/mozilla/tests/css/background_rust_ref.html
new file mode 100644
index 00000000000..81f0d15e1fc
--- /dev/null
+++ b/tests/wpt/mozilla/tests/css/background_rust_ref.html
@@ -0,0 +1,9 @@
+
+
+
+
+
+
+
+
+
diff --git a/tests/ref/subdirectory/background_image.css b/tests/wpt/mozilla/tests/css/subdirectory/background_image.css
similarity index 100%
rename from tests/ref/subdirectory/background_image.css
rename to tests/wpt/mozilla/tests/css/subdirectory/background_image.css