diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index c0a10365402..b44a7b24166 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -51,7 +51,6 @@ prefs:"layout.flex-direction.enabled,layout.flex.enabled" == flex_column_directi
prefs:"layout.flex.enabled" == flex_row_direction.html flex_row_direction_ref.html
== float_clearance_intrinsic_width_a.html float_clearance_intrinsic_width_ref.html
== float_positioned_pseudo_stacking_context.html float_positioned_pseudo_stacking_context_ref.html
-== floated_generated_content_a.html floated_generated_content_b.html
== floated_negative_margins_a.html floated_negative_margins_ref.html
== font_size.html font_size_ref.html
# `?` and `#` in the name is a test for https://github.com/servo/servo/issues/3340
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 0a4140ed203..e3355cfef71 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -899,6 +899,18 @@
"url": "/_mozilla/css/float_under_top_margin_a.html"
}
],
+ "css/floated_generated_content_a.html": [
+ {
+ "path": "css/floated_generated_content_a.html",
+ "references": [
+ [
+ "/_mozilla/css/floated_generated_content_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/floated_generated_content_a.html"
+ }
+ ],
"css/floated_list_item_a.html": [
{
"path": "css/floated_list_item_a.html",
@@ -5064,6 +5076,18 @@
"url": "/_mozilla/css/float_under_top_margin_a.html"
}
],
+ "css/floated_generated_content_a.html": [
+ {
+ "path": "css/floated_generated_content_a.html",
+ "references": [
+ [
+ "/_mozilla/css/floated_generated_content_b.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/floated_generated_content_a.html"
+ }
+ ],
"css/floated_list_item_a.html": [
{
"path": "css/floated_list_item_a.html",
diff --git a/tests/ref/floated_generated_content_a.html b/tests/wpt/mozilla/tests/css/floated_generated_content_a.html
similarity index 75%
rename from tests/ref/floated_generated_content_a.html
rename to tests/wpt/mozilla/tests/css/floated_generated_content_a.html
index 0ba5f509f19..7e82d877bbb 100644
--- a/tests/ref/floated_generated_content_a.html
+++ b/tests/wpt/mozilla/tests/css/floated_generated_content_a.html
@@ -1,6 +1,7 @@
+