diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 6f5a4fa1ceb..c8f07ee3a6a 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -34,7 +34,6 @@ prefs:"layout.writing-mode.enabled" == iframe/size_attributes_vertical_writing_m
== iframe/stacking_context.html iframe/stacking_context_ref.html
== iframe/stacking_context_position_a.html iframe/stacking_context_position_ref.html
-== inline_block_margin_auto_a.html inline_block_margin_auto_ref.html
== inline_block_parent_width.html inline_block_parent_width_ref.html
== inline_block_parent_width_percentage.html inline_block_parent_width_ref.html
# inline_border_a.html inline_border_b.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 3d0faa83feb..a708444d8fd 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -1847,6 +1847,18 @@
"url": "/_mozilla/css/inline_block_margin_a.html"
}
],
+ "css/inline_block_margin_auto_a.html": [
+ {
+ "path": "css/inline_block_margin_auto_a.html",
+ "references": [
+ [
+ "/_mozilla/css/inline_block_margin_auto_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/inline_block_margin_auto_a.html"
+ }
+ ],
"css/inline_block_margin_auto_zero_a.html": [
{
"path": "css/inline_block_margin_auto_zero_a.html",
@@ -6792,6 +6804,18 @@
"url": "/_mozilla/css/inline_block_margin_a.html"
}
],
+ "css/inline_block_margin_auto_a.html": [
+ {
+ "path": "css/inline_block_margin_auto_a.html",
+ "references": [
+ [
+ "/_mozilla/css/inline_block_margin_auto_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/inline_block_margin_auto_a.html"
+ }
+ ],
"css/inline_block_margin_auto_zero_a.html": [
{
"path": "css/inline_block_margin_auto_zero_a.html",
diff --git a/tests/ref/inline_block_margin_auto_a.html b/tests/wpt/mozilla/tests/css/inline_block_margin_auto_a.html
similarity index 83%
rename from tests/ref/inline_block_margin_auto_a.html
rename to tests/wpt/mozilla/tests/css/inline_block_margin_auto_a.html
index 3fa23c34563..cba325fd717 100644
--- a/tests/ref/inline_block_margin_auto_a.html
+++ b/tests/wpt/mozilla/tests/css/inline_block_margin_auto_a.html
@@ -1,4 +1,5 @@
+