diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 41d646aab50..d5f73c9a594 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -284,7 +284,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
== rtl_body.html rtl_body_ref.html
== rtl_float_a.html rtl_float_ref.html
== rtl_margin_a.html rtl_margin_ref.html
-== rtl_simple.html rtl_simple_ref.html
# text_decoration_propagation_a.html text_decoration_propagation_b.html
!= text_decoration_smoke_a.html text_decoration_smoke_ref.html
!= text_decoration_underline_subpx_a.html text_decoration_underline_subpx_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 1e6e70c2a6b..278f41179cc 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/rtl_simple.html": [
+ {
+ "path": "css/rtl_simple.html",
+ "references": [
+ [
+ "/_mozilla/css/rtl_simple_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/rtl_simple.html"
+ }
+ ],
"css/rtl_table_a.html": [
{
"path": "css/rtl_table_a.html",
@@ -2880,6 +2892,18 @@
"url": "/_mozilla/css/flex_nochild.html"
}
],
+ "css/rtl_simple.html": [
+ {
+ "path": "css/rtl_simple.html",
+ "references": [
+ [
+ "/_mozilla/css/rtl_simple_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/rtl_simple.html"
+ }
+ ],
"css/rtl_table_a.html": [
{
"path": "css/rtl_table_a.html",
diff --git a/tests/ref/rtl_simple.html b/tests/wpt/mozilla/tests/css/rtl_simple.html
similarity index 85%
rename from tests/ref/rtl_simple.html
rename to tests/wpt/mozilla/tests/css/rtl_simple.html
index eb1d524e2ec..b8b3ca952ac 100644
--- a/tests/ref/rtl_simple.html
+++ b/tests/wpt/mozilla/tests/css/rtl_simple.html
@@ -1,4 +1,5 @@
+