diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 12c5a75247f..d3d13bfd30c 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -151,7 +151,6 @@ prefs:"layout.writing-mode.enabled" == iframe/size_attributes_vertical_writing_m
== legacy_th_width_attribute_a.html legacy_td_width_attribute_ref.html
== line_height_a.html line_height_ref.html
!= linear_gradients_corners_a.html linear_gradients_corners_ref.html
-== linear_gradients_reverse_a.html linear_gradients_reverse_ref.html
!= linear_gradients_smoke_a.html linear_gradients_smoke_ref.html
flaky_cpu == linebreak_simple_a.html linebreak_simple_b.html
# Fails intermittently (#3636)
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 8a962fe6086..579677db1f3 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -983,6 +983,18 @@
"url": "/_mozilla/css/linear_gradients_parsing_a.html"
}
],
+ "css/linear_gradients_reverse_a.html": [
+ {
+ "path": "css/linear_gradients_reverse_a.html",
+ "references": [
+ [
+ "/_mozilla/css/linear_gradients_reverse_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/linear_gradients_reverse_a.html"
+ }
+ ],
"css/linebreak_inline_span_a.html": [
{
"path": "css/linebreak_inline_span_a.html",
@@ -4404,6 +4416,18 @@
"url": "/_mozilla/css/linear_gradients_parsing_a.html"
}
],
+ "css/linear_gradients_reverse_a.html": [
+ {
+ "path": "css/linear_gradients_reverse_a.html",
+ "references": [
+ [
+ "/_mozilla/css/linear_gradients_reverse_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/linear_gradients_reverse_a.html"
+ }
+ ],
"css/linebreak_inline_span_a.html": [
{
"path": "css/linebreak_inline_span_a.html",
diff --git a/tests/ref/linear_gradients_reverse_a.html b/tests/wpt/mozilla/tests/css/linear_gradients_reverse_a.html
similarity index 91%
rename from tests/ref/linear_gradients_reverse_a.html
rename to tests/wpt/mozilla/tests/css/linear_gradients_reverse_a.html
index 4172834ec37..ec74f0c8e08 100644
--- a/tests/ref/linear_gradients_reverse_a.html
+++ b/tests/wpt/mozilla/tests/css/linear_gradients_reverse_a.html
@@ -1,6 +1,7 @@
+