diff --git a/tests/ref/4x2.png b/tests/ref/4x2.png
deleted file mode 100644
index eb0c5cda971..00000000000
Binary files a/tests/ref/4x2.png and /dev/null differ
diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 7829c960ca7..c57dae5f8a5 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -34,8 +34,6 @@ prefs:"layout.writing-mode.enabled" == iframe/size_attributes_vertical_writing_m
== iframe/stacking_context.html iframe/stacking_context_ref.html
== iframe/stacking_context_position_a.html iframe/stacking_context_position_ref.html
-!= image_rendering_auto_a.html image_rendering_pixelated_a.html
-== image_rendering_pixelated_a.html image_rendering_pixelated_ref.html
== img_block_maxwidth_a.html img_block_maxwidth_ref.html
== img_block_maxwidth_b.html img_block_maxwidth_ref.html
!= img_simple.html img_simple_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index b51db1b86a0..e19b44b658a 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -1559,6 +1559,30 @@
"url": "/_mozilla/css/hide_after_create.html"
}
],
+ "css/image_rendering_auto_a.html": [
+ {
+ "path": "css/image_rendering_auto_a.html",
+ "references": [
+ [
+ "/_mozilla/css/image_rendering_pixelated_a.html",
+ "!="
+ ]
+ ],
+ "url": "/_mozilla/css/image_rendering_auto_a.html"
+ }
+ ],
+ "css/image_rendering_pixelated_a.html": [
+ {
+ "path": "css/image_rendering_pixelated_a.html",
+ "references": [
+ [
+ "/_mozilla/css/image_rendering_pixelated_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/image_rendering_pixelated_a.html"
+ }
+ ],
"css/img_block_display_a.html": [
{
"path": "css/img_block_display_a.html",
@@ -6432,6 +6456,30 @@
"url": "/_mozilla/css/hide_after_create.html"
}
],
+ "css/image_rendering_auto_a.html": [
+ {
+ "path": "css/image_rendering_auto_a.html",
+ "references": [
+ [
+ "/_mozilla/css/image_rendering_pixelated_a.html",
+ "!="
+ ]
+ ],
+ "url": "/_mozilla/css/image_rendering_auto_a.html"
+ }
+ ],
+ "css/image_rendering_pixelated_a.html": [
+ {
+ "path": "css/image_rendering_pixelated_a.html",
+ "references": [
+ [
+ "/_mozilla/css/image_rendering_pixelated_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/image_rendering_pixelated_a.html"
+ }
+ ],
"css/img_block_display_a.html": [
{
"path": "css/img_block_display_a.html",
diff --git a/tests/ref/image_rendering_auto_a.html b/tests/wpt/mozilla/tests/css/image_rendering_auto_a.html
similarity index 80%
rename from tests/ref/image_rendering_auto_a.html
rename to tests/wpt/mozilla/tests/css/image_rendering_auto_a.html
index 440bfa9abd8..37f65265af7 100644
--- a/tests/ref/image_rendering_auto_a.html
+++ b/tests/wpt/mozilla/tests/css/image_rendering_auto_a.html
@@ -2,6 +2,7 @@
+