diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index b431ac15293..724e7714323 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -266,7 +266,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
== position_relative_inline_block_a.html position_relative_inline_block_ref.html
== position_relative_painting_order_a.html position_relative_painting_order_ref.html
== position_relative_stacking_context_a.html position_relative_stacking_context_ref.html
-== position_relative_stacking_context_contents_a.html position_relative_stacking_context_contents_ref.html
== root_display_inline_a.html root_display_ref.html
== root_display_without_style_a.html root_display_ref.html
# text_decoration_propagation_a.html text_decoration_propagation_b.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 083180826e4..375384b6fce 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/position_relative_stacking_context_contents_a.html": [
+ {
+ "path": "css/position_relative_stacking_context_contents_a.html",
+ "references": [
+ [
+ "/_mozilla/css/position_relative_stacking_context_contents_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/position_relative_stacking_context_contents_a.html"
+ }
+ ],
"css/position_relative_top_percentage_a.html": [
{
"path": "css/position_relative_top_percentage_a.html",
@@ -3072,6 +3084,18 @@
"url": "/_mozilla/css/flex_nochild.html"
}
],
+ "css/position_relative_stacking_context_contents_a.html": [
+ {
+ "path": "css/position_relative_stacking_context_contents_a.html",
+ "references": [
+ [
+ "/_mozilla/css/position_relative_stacking_context_contents_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/position_relative_stacking_context_contents_a.html"
+ }
+ ],
"css/position_relative_top_percentage_a.html": [
{
"path": "css/position_relative_top_percentage_a.html",
diff --git a/tests/ref/position_relative_stacking_context_contents_a.html b/tests/wpt/mozilla/tests/css/position_relative_stacking_context_contents_a.html
similarity index 80%
rename from tests/ref/position_relative_stacking_context_contents_a.html
rename to tests/wpt/mozilla/tests/css/position_relative_stacking_context_contents_a.html
index 78c312699f3..9dfcbf12631 100644
--- a/tests/ref/position_relative_stacking_context_contents_a.html
+++ b/tests/wpt/mozilla/tests/css/position_relative_stacking_context_contents_a.html
@@ -1,4 +1,5 @@
+