diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 8b7ff4d65b7..87086baa2b8 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_spacing_a.html border_spacing_ref.html
 == border_spacing_auto_layout_a.html border_spacing_ref.html
 == border_spacing_empty_table.html border_spacing_empty_table_ref.html
 == border_spacing_fixed_layout_a.html border_spacing_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index b00fa678bc6..ba6d921e301 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -767,6 +767,18 @@
             "url": "/_mozilla/css/border_rounding_1px_invisible_issue_7184_a.html"
           }
         ],
+        "css/border_spacing_a.html": [
+          {
+            "path": "css/border_spacing_a.html",
+            "references": [
+              [
+                "/_mozilla/css/border_spacing_ref.html",
+                "=="
+              ]
+            ],
+            "url": "/_mozilla/css/border_spacing_a.html"
+          }
+        ],
         "css/class-namespaces.html": [
           {
             "path": "css/class-namespaces.html",
@@ -4596,6 +4608,18 @@
           "url": "/_mozilla/css/border_rounding_1px_invisible_issue_7184_a.html"
         }
       ],
+      "css/border_spacing_a.html": [
+        {
+          "path": "css/border_spacing_a.html",
+          "references": [
+            [
+              "/_mozilla/css/border_spacing_ref.html",
+              "=="
+            ]
+          ],
+          "url": "/_mozilla/css/border_spacing_a.html"
+        }
+      ],
       "css/class-namespaces.html": [
         {
           "path": "css/class-namespaces.html",
diff --git a/tests/ref/border_spacing_a.html b/tests/wpt/mozilla/tests/css/border_spacing_a.html
similarity index 92%
rename from tests/ref/border_spacing_a.html
rename to tests/wpt/mozilla/tests/css/border_spacing_a.html
index cd76c64b274..b1bb79ad40d 100644
--- a/tests/ref/border_spacing_a.html
+++ b/tests/wpt/mozilla/tests/css/border_spacing_a.html
@@ -2,6 +2,7 @@
 <html>
 <head>
 <!-- Tests that `border-spacing` works. -->
+<link rel=match href=border_spacing_ref.html>
 <style>
 body, html {
     margin: 0;
diff --git a/tests/wpt/mozilla/tests/css/border_spacing_ref.html b/tests/wpt/mozilla/tests/css/border_spacing_ref.html
new file mode 100644
index 00000000000..b5a4827badd
--- /dev/null
+++ b/tests/wpt/mozilla/tests/css/border_spacing_ref.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html>
+<head>
+<!-- Tests that `border-spacing` works. -->
+<style>
+div {
+    background: blue;
+    position: absolute;
+    height: 32px;
+}
+#a, #c {
+    width: 32px;
+}
+#b, #d {
+    width: 64px;
+}
+#a, #b {
+    top: 6px;
+}
+#c, #d {
+    top: 44px;
+}
+#a, #c {
+    left: 6px;
+}
+#b, #d {
+    left: 44px;
+}
+</style>
+</head>
+<body>
+<div id=a></div>
+<div id=b></div>
+<div id=c></div>
+<div id=d></div>
+</body>
+</html>
+
+
