diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index a842da0f577..0fc001c4c63 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -35,7 +35,6 @@ prefs:"layout.writing-mode.enabled" == iframe/size_attributes_vertical_writing_m
== iframe/stacking_context_position_a.html iframe/stacking_context_position_ref.html
# inline_border_a.html inline_border_b.html
-== line_height_a.html line_height_ref.html
!= linear_gradients_corners_a.html linear_gradients_corners_ref.html
!= linear_gradients_smoke_a.html linear_gradients_smoke_ref.html
flaky_cpu == linebreak_simple_a.html linebreak_simple_b.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 98080733ad0..11653bdc73a 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -2379,6 +2379,18 @@
"url": "/_mozilla/css/line_breaking_whitespace_collapse_a.html"
}
],
+ "css/line_height_a.html": [
+ {
+ "path": "css/line_height_a.html",
+ "references": [
+ [
+ "/_mozilla/css/line_height_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/line_height_a.html"
+ }
+ ],
"css/line_height_float_placement_a.html": [
{
"path": "css/line_height_float_placement_a.html",
@@ -7516,6 +7528,18 @@
"url": "/_mozilla/css/line_breaking_whitespace_collapse_a.html"
}
],
+ "css/line_height_a.html": [
+ {
+ "path": "css/line_height_a.html",
+ "references": [
+ [
+ "/_mozilla/css/line_height_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/line_height_a.html"
+ }
+ ],
"css/line_height_float_placement_a.html": [
{
"path": "css/line_height_float_placement_a.html",
diff --git a/tests/ref/line_height_a.html b/tests/wpt/mozilla/tests/css/line_height_a.html
similarity index 88%
rename from tests/ref/line_height_a.html
rename to tests/wpt/mozilla/tests/css/line_height_a.html
index b36476d3940..c995e2c1dd0 100644
--- a/tests/ref/line_height_a.html
+++ b/tests/wpt/mozilla/tests/css/line_height_a.html
@@ -1,6 +1,7 @@
+