diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index c1ce97861c0..c0587599d9e 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -15,8 +15,6 @@ flaky_cpu == append_style_a.html append_style_b.html
resolution=300x300,device-pixel-ratio=2 != pixel_snapping_border_a.html pixel_snapping_border_ref.html
resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_snapping_position_ref.html
-# commented out because multiple layers don't work with reftests --pcwalton
-# == position_fixed_static_y_a.html position_fixed_static_y_b.html
# text_decoration_propagation_a.html text_decoration_propagation_b.html
!= text_overflow_a.html text_overflow_ref.html
flaky_cpu,prefs:"layout.writing-mode.enabled" == vertical-lr-blocks.html vertical-lr-blocks_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 2bc9d1396c8..da86df98d0d 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -3607,6 +3607,18 @@
"url": "/_mozilla/css/position_fixed_simple_a.html"
}
],
+ "css/position_fixed_static_y_a.html": [
+ {
+ "path": "css/position_fixed_static_y_a.html",
+ "references": [
+ [
+ "/_mozilla/css/position_fixed_static_y_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/position_fixed_static_y_a.html"
+ }
+ ],
"css/position_fixed_tile_edge.html": [
{
"path": "css/position_fixed_tile_edge.html",
@@ -9366,6 +9378,18 @@
"url": "/_mozilla/css/position_fixed_simple_a.html"
}
],
+ "css/position_fixed_static_y_a.html": [
+ {
+ "path": "css/position_fixed_static_y_a.html",
+ "references": [
+ [
+ "/_mozilla/css/position_fixed_static_y_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/position_fixed_static_y_a.html"
+ }
+ ],
"css/position_fixed_tile_edge.html": [
{
"path": "css/position_fixed_tile_edge.html",
diff --git a/tests/ref/position_fixed_static_y_a.html b/tests/wpt/mozilla/tests/css/position_fixed_static_y_a.html
similarity index 92%
rename from tests/ref/position_fixed_static_y_a.html
rename to tests/wpt/mozilla/tests/css/position_fixed_static_y_a.html
index 5d44f77006f..f7c7d5b1f93 100644
--- a/tests/ref/position_fixed_static_y_a.html
+++ b/tests/wpt/mozilla/tests/css/position_fixed_static_y_a.html
@@ -1,5 +1,6 @@
+