diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 1db8d952610..41523a9a60f 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -302,7 +302,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
== stacked_layers.html stacked_layers_ref.html
== stacking_context_overflow_a.html stacking_context_overflow_ref.html
== stacking_context_overflow_relative_outline_a.html stacking_context_overflow_relative_outline_ref.html
-== style_is_in_doc.html style_is_in_doc_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 5377abcc0d0..6f5bebe605f 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -603,6 +603,18 @@
"url": "/_mozilla/css/stacking_context_rtl.html"
}
],
+ "css/style_is_in_doc.html": [
+ {
+ "path": "css/style_is_in_doc.html",
+ "references": [
+ [
+ "/_mozilla/css/style_is_in_doc_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/style_is_in_doc.html"
+ }
+ ],
"css/submit_focus_a.html": [
{
"path": "css/submit_focus_a.html",
@@ -2600,6 +2612,18 @@
"url": "/_mozilla/css/stacking_context_rtl.html"
}
],
+ "css/style_is_in_doc.html": [
+ {
+ "path": "css/style_is_in_doc.html",
+ "references": [
+ [
+ "/_mozilla/css/style_is_in_doc_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/style_is_in_doc.html"
+ }
+ ],
"css/submit_focus_a.html": [
{
"path": "css/submit_focus_a.html",
diff --git a/tests/ref/style_is_in_doc.html b/tests/wpt/mozilla/tests/css/style_is_in_doc.html
similarity index 94%
rename from tests/ref/style_is_in_doc.html
rename to tests/wpt/mozilla/tests/css/style_is_in_doc.html
index 9cc72e43343..cb3a56c7671 100644
--- a/tests/ref/style_is_in_doc.html
+++ b/tests/wpt/mozilla/tests/css/style_is_in_doc.html
@@ -1,6 +1,7 @@
+