diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index e10bfba722f..745cf6cfdc7 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -12,7 +12,6 @@ fragment=top != ../html/acid2.html acid2_ref.html
== acid1_a.html acid1_b.html
== acid2_noscroll.html acid2_ref_broken.html
flaky_cpu == append_style_a.html append_style_b.html
-== border_collapse_missing_cell_a.html border_collapse_missing_cell_ref.html
== border_collapse_simple_a.html border_collapse_simple_ref.html
== border_radius_asymmetric_sizes_a.html border_radius_asymmetric_sizes_ref.html
== border_radius_clip_a.html border_radius_clip_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 6e6cd5392e7..36ddeecf0ff 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -647,6 +647,18 @@
"url": "/_mozilla/css/border_code_tag.html"
}
],
+ "css/border_collapse_missing_cell_a.html": [
+ {
+ "path": "css/border_collapse_missing_cell_a.html",
+ "references": [
+ [
+ "/_mozilla/css/border_collapse_missing_cell_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/border_collapse_missing_cell_a.html"
+ }
+ ],
"css/class-namespaces.html": [
{
"path": "css/class-namespaces.html",
@@ -2820,6 +2832,18 @@
"url": "/_mozilla/css/border_code_tag.html"
}
],
+ "css/border_collapse_missing_cell_a.html": [
+ {
+ "path": "css/border_collapse_missing_cell_a.html",
+ "references": [
+ [
+ "/_mozilla/css/border_collapse_missing_cell_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/border_collapse_missing_cell_a.html"
+ }
+ ],
"css/class-namespaces.html": [
{
"path": "css/class-namespaces.html",
diff --git a/tests/ref/border_collapse_missing_cell_a.html b/tests/wpt/mozilla/tests/css/border_collapse_missing_cell_a.html
similarity index 87%
rename from tests/ref/border_collapse_missing_cell_a.html
rename to tests/wpt/mozilla/tests/css/border_collapse_missing_cell_a.html
index 023ea8c541b..e5e24f21107 100644
--- a/tests/ref/border_collapse_missing_cell_a.html
+++ b/tests/wpt/mozilla/tests/css/border_collapse_missing_cell_a.html
@@ -2,6 +2,7 @@
+