diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 1b714289872..6d4517a15e1 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -133,7 +133,6 @@ prefs:"layout.writing-mode.enabled" == iframe/size_attributes_vertical_writing_m
== inline_block_parent_padding_a.html inline_block_parent_padding_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_block_stacking_context_a.html inline_block_stacking_context_ref.html
# inline_border_a.html inline_border_b.html
== inline_whitespace_a.html inline_whitespace_ref.html
== inline_whitespace_b.html inline_whitespace_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 376aa975866..479b2024adc 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -731,6 +731,18 @@
"url": "/_mozilla/css/inline_block_percentage_height_a.html"
}
],
+ "css/inline_block_stacking_context_a.html": [
+ {
+ "path": "css/inline_block_stacking_context_a.html",
+ "references": [
+ [
+ "/_mozilla/css/inline_block_stacking_context_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/inline_block_stacking_context_a.html"
+ }
+ ],
"css/inline_block_with_margin_a.html": [
{
"path": "css/inline_block_with_margin_a.html",
@@ -4272,6 +4284,18 @@
"url": "/_mozilla/css/inline_block_percentage_height_a.html"
}
],
+ "css/inline_block_stacking_context_a.html": [
+ {
+ "path": "css/inline_block_stacking_context_a.html",
+ "references": [
+ [
+ "/_mozilla/css/inline_block_stacking_context_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/inline_block_stacking_context_a.html"
+ }
+ ],
"css/inline_block_with_margin_a.html": [
{
"path": "css/inline_block_with_margin_a.html",
diff --git a/tests/ref/inline_block_stacking_context_a.html b/tests/wpt/mozilla/tests/css/inline_block_stacking_context_a.html
similarity index 87%
rename from tests/ref/inline_block_stacking_context_a.html
rename to tests/wpt/mozilla/tests/css/inline_block_stacking_context_a.html
index 7f203821786..43b011810e4 100644
--- a/tests/ref/inline_block_stacking_context_a.html
+++ b/tests/wpt/mozilla/tests/css/inline_block_stacking_context_a.html
@@ -1,6 +1,7 @@
+