diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 283a759f2d8..e198109afc5 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -270,7 +270,6 @@ resolution=300x300,device-pixel-ratio=2 != pixel_snapping_position_a.html pixel_
== position_relative_top_percentage_a.html position_relative_top_percentage_b.html
== position_relative_vertical_percentage_overflow_a.html position_relative_vertical_percentage_overflow_ref.html
== pre_ignorable_whitespace_a.html pre_ignorable_whitespace_ref.html
-== pre_with_tab.html pre_with_tab_ref.html
== root_display_inline_a.html root_display_ref.html
== root_display_without_style_a.html root_display_ref.html
# text_decoration_propagation_a.html text_decoration_propagation_b.html
diff --git a/tests/ref/pre_with_tab.html b/tests/ref/pre_with_tab.html
deleted file mode 100644
index b5bfcf42fa2..00000000000
--- a/tests/ref/pre_with_tab.html
+++ /dev/null
@@ -1 +0,0 @@
- tab
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index b8d2fb4fe5b..66f53f13cbd 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/pre_with_tab.html": [
+ {
+ "path": "css/pre_with_tab.html",
+ "references": [
+ [
+ "/_mozilla/css/pre_with_tab_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/pre_with_tab.html"
+ }
+ ],
"css/pseudo_content_with_layers.html": [
{
"path": "css/pseudo_content_with_layers.html",
@@ -3024,6 +3036,18 @@
"url": "/_mozilla/css/flex_nochild.html"
}
],
+ "css/pre_with_tab.html": [
+ {
+ "path": "css/pre_with_tab.html",
+ "references": [
+ [
+ "/_mozilla/css/pre_with_tab_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/pre_with_tab.html"
+ }
+ ],
"css/pseudo_content_with_layers.html": [
{
"path": "css/pseudo_content_with_layers.html",
diff --git a/tests/wpt/mozilla/tests/css/pre_with_tab.html b/tests/wpt/mozilla/tests/css/pre_with_tab.html
new file mode 100644
index 00000000000..bbcfd6856a5
--- /dev/null
+++ b/tests/wpt/mozilla/tests/css/pre_with_tab.html
@@ -0,0 +1 @@
+ tab
diff --git a/tests/ref/pre_with_tab_ref.html b/tests/wpt/mozilla/tests/css/pre_with_tab_ref.html
similarity index 100%
rename from tests/ref/pre_with_tab_ref.html
rename to tests/wpt/mozilla/tests/css/pre_with_tab_ref.html