diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index ca5537d6e9a..2e0f202bd53 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -252,7 +252,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
== position_abs_pseudo_a.html position_abs_pseudo_b.html
== position_abs_replaced_simple_a.html position_abs_replaced_simple_b.html
== position_abs_static_y_a.html position_abs_static_y_b.html
-== position_abs_width_percentage_a.html position_abs_width_percentage_b.html
# commented out because multiple layers don't work with reftests --pcwalton
# == position_fixed_a.html position_fixed_b.html
# == position_fixed_simple_a.html position_fixed_simple_b.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 6636ea78b08..8b3e3b3e298 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -683,6 +683,18 @@
"url": "/_mozilla/css/flex_nochild.html"
}
],
+ "css/position_abs_width_percentage_a.html": [
+ {
+ "path": "css/position_abs_width_percentage_a.html",
+ "references": [
+ [
+ "/_mozilla/css/position_abs_width_percentage_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/position_abs_width_percentage_a.html"
+ }
+ ],
"css/position_fixed_background_color_a.html": [
{
"path": "css/position_fixed_background_color_a.html",
@@ -3156,6 +3168,18 @@
"url": "/_mozilla/css/flex_nochild.html"
}
],
+ "css/position_abs_width_percentage_a.html": [
+ {
+ "path": "css/position_abs_width_percentage_a.html",
+ "references": [
+ [
+ "/_mozilla/css/position_abs_width_percentage_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/position_abs_width_percentage_a.html"
+ }
+ ],
"css/position_fixed_background_color_a.html": [
{
"path": "css/position_fixed_background_color_a.html",
diff --git a/tests/ref/position_abs_width_percentage_a.html b/tests/wpt/mozilla/tests/css/position_abs_width_percentage_a.html
similarity index 85%
rename from tests/ref/position_abs_width_percentage_a.html
rename to tests/wpt/mozilla/tests/css/position_abs_width_percentage_a.html
index 956f8470f90..f9ac2d46b32 100644
--- a/tests/ref/position_abs_width_percentage_a.html
+++ b/tests/wpt/mozilla/tests/css/position_abs_width_percentage_a.html
@@ -1,5 +1,6 @@
+