diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index c0f66e3e1ee..62e5a0ffe2b 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -310,7 +310,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
== table_cell_float_a.html table_cell_float_ref.html
== table_center_a.html table_center_ref.html
== table_colspan_fixed_a.html table_colspan_fixed_ref.html
-== table_colspan_simple_a.html table_colspan_simple_ref.html
# text_decoration_propagation_a.html text_decoration_propagation_b.html
!= text_decoration_smoke_a.html text_decoration_smoke_ref.html
!= text_decoration_underline_subpx_a.html text_decoration_underline_subpx_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 88b6384bf9d..04ea196f3a2 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -603,6 +603,18 @@
"url": "/_mozilla/css/stacking_context_rtl.html"
}
],
+ "css/table_colspan_simple_a.html": [
+ {
+ "path": "css/table_colspan_simple_a.html",
+ "references": [
+ [
+ "/_mozilla/css/table_colspan_simple_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/table_colspan_simple_a.html"
+ }
+ ],
"css/table_containing_block_a.html": [
{
"path": "css/table_containing_block_a.html",
@@ -2504,6 +2516,18 @@
"url": "/_mozilla/css/stacking_context_rtl.html"
}
],
+ "css/table_colspan_simple_a.html": [
+ {
+ "path": "css/table_colspan_simple_a.html",
+ "references": [
+ [
+ "/_mozilla/css/table_colspan_simple_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/table_colspan_simple_a.html"
+ }
+ ],
"css/table_containing_block_a.html": [
{
"path": "css/table_containing_block_a.html",
diff --git a/tests/ref/table_colspan_simple_a.html b/tests/wpt/mozilla/tests/css/table_colspan_simple_a.html
similarity index 89%
rename from tests/ref/table_colspan_simple_a.html
rename to tests/wpt/mozilla/tests/css/table_colspan_simple_a.html
index 41993cc01f5..0bd5292552c 100644
--- a/tests/ref/table_colspan_simple_a.html
+++ b/tests/wpt/mozilla/tests/css/table_colspan_simple_a.html
@@ -1,5 +1,6 @@
+