diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index d0873ca92ad..605d9a88c82 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -140,7 +140,6 @@ prefs:"layout.writing-mode.enabled" == iframe/size_attributes_vertical_writing_m
# inline_border_a.html inline_border_b.html
== inline_hypothetical_box_a.html inline_hypothetical_box_ref.html
== inline_margin_multiple_fragments_a.html inline_margin_multiple_fragments_ref.html
-== inline_margins_intrinsic_size_a.html inline_margins_intrinsic_size_ref.html
== inline_whitespace_a.html inline_whitespace_ref.html
== inline_whitespace_b.html inline_whitespace_ref.html
== input_button_margins_a.html input_button_margins_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 03fb5db1b42..d7d904b31e7 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -743,6 +743,18 @@
"url": "/_mozilla/css/inline_margins_a.html"
}
],
+ "css/inline_margins_intrinsic_size_a.html": [
+ {
+ "path": "css/inline_margins_intrinsic_size_a.html",
+ "references": [
+ [
+ "/_mozilla/css/inline_margins_intrinsic_size_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/inline_margins_intrinsic_size_a.html"
+ }
+ ],
"css/inline_padding_a.html": [
{
"path": "css/inline_padding_a.html",
@@ -4092,6 +4104,18 @@
"url": "/_mozilla/css/inline_margins_a.html"
}
],
+ "css/inline_margins_intrinsic_size_a.html": [
+ {
+ "path": "css/inline_margins_intrinsic_size_a.html",
+ "references": [
+ [
+ "/_mozilla/css/inline_margins_intrinsic_size_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/inline_margins_intrinsic_size_a.html"
+ }
+ ],
"css/inline_padding_a.html": [
{
"path": "css/inline_padding_a.html",
@@ -6138,4 +6162,4 @@
"rev": null,
"url_base": "/_mozilla/",
"version": 2
-}
+}
\ No newline at end of file
diff --git a/tests/ref/inline_margins_intrinsic_size_a.html b/tests/wpt/mozilla/tests/css/inline_margins_intrinsic_size_a.html
similarity index 70%
rename from tests/ref/inline_margins_intrinsic_size_a.html
rename to tests/wpt/mozilla/tests/css/inline_margins_intrinsic_size_a.html
index 5a3e639a2dd..7c9ef8dc680 100644
--- a/tests/ref/inline_margins_intrinsic_size_a.html
+++ b/tests/wpt/mozilla/tests/css/inline_margins_intrinsic_size_a.html
@@ -1,4 +1,5 @@
+