diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 64763ff1817..82588852d47 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -155,7 +155,6 @@ prefs:"layout.writing-mode.enabled" == iframe/size_attributes_vertical_writing_m
== legacy_cellspacing_attribute_a.html border_spacing_ref.html
== legacy_td_width_attribute_a.html legacy_td_width_attribute_ref.html
== legacy_th_width_attribute_a.html legacy_td_width_attribute_ref.html
-== line_breaking_whitespace_collapse_a.html line_breaking_whitespace_collapse_ref.html
== line_height_a.html line_height_ref.html
!= linear_gradients_corners_a.html linear_gradients_corners_ref.html
== linear_gradients_parsing_a.html linear_gradients_parsing_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 4b5f6fcabf5..131aab0e72d 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -863,6 +863,18 @@
"url": "/_mozilla/css/li_absolute_containing_block_a.html"
}
],
+ "css/line_breaking_whitespace_collapse_a.html": [
+ {
+ "path": "css/line_breaking_whitespace_collapse_a.html",
+ "references": [
+ [
+ "/_mozilla/css/line_breaking_whitespace_collapse_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/line_breaking_whitespace_collapse_a.html"
+ }
+ ],
"css/line_height_float_placement_a.html": [
{
"path": "css/line_height_float_placement_a.html",
@@ -4176,6 +4188,18 @@
"url": "/_mozilla/css/li_absolute_containing_block_a.html"
}
],
+ "css/line_breaking_whitespace_collapse_a.html": [
+ {
+ "path": "css/line_breaking_whitespace_collapse_a.html",
+ "references": [
+ [
+ "/_mozilla/css/line_breaking_whitespace_collapse_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/line_breaking_whitespace_collapse_a.html"
+ }
+ ],
"css/line_height_float_placement_a.html": [
{
"path": "css/line_height_float_placement_a.html",
diff --git a/tests/ref/line_breaking_whitespace_collapse_a.html b/tests/wpt/mozilla/tests/css/line_breaking_whitespace_collapse_a.html
similarity index 80%
rename from tests/ref/line_breaking_whitespace_collapse_a.html
rename to tests/wpt/mozilla/tests/css/line_breaking_whitespace_collapse_a.html
index fdba44158de..38e9f70d088 100644
--- a/tests/ref/line_breaking_whitespace_collapse_a.html
+++ b/tests/wpt/mozilla/tests/css/line_breaking_whitespace_collapse_a.html
@@ -1,6 +1,7 @@
+