diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 69459749195..e7fa8a48dd8 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
-!= blur_a.html blur_ref.html
!= border_black_groove.html border_black_solid.html
!= border_black_ridge.html border_black_groove.html
!= border_black_ridge.html border_black_solid.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 211d47e60de..6099e1f055a 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -595,6 +595,18 @@
"url": "/_mozilla/css/block_replaced_content_b.html"
}
],
+ "css/blur_a.html": [
+ {
+ "path": "css/blur_a.html",
+ "references": [
+ [
+ "/_mozilla/css/blur_ref.html",
+ "!="
+ ]
+ ],
+ "url": "/_mozilla/css/blur_a.html"
+ }
+ ],
"css/class-namespaces.html": [
{
"path": "css/class-namespaces.html",
@@ -2716,6 +2728,18 @@
"url": "/_mozilla/css/block_replaced_content_b.html"
}
],
+ "css/blur_a.html": [
+ {
+ "path": "css/blur_a.html",
+ "references": [
+ [
+ "/_mozilla/css/blur_ref.html",
+ "!="
+ ]
+ ],
+ "url": "/_mozilla/css/blur_a.html"
+ }
+ ],
"css/class-namespaces.html": [
{
"path": "css/class-namespaces.html",
diff --git a/tests/ref/blur_a.html b/tests/wpt/mozilla/tests/css/blur_a.html
similarity index 94%
rename from tests/ref/blur_a.html
rename to tests/wpt/mozilla/tests/css/blur_a.html
index 8a589b52b80..a75af6a0207 100644
--- a/tests/ref/blur_a.html
+++ b/tests/wpt/mozilla/tests/css/blur_a.html
@@ -1,6 +1,7 @@
+