diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index c72b458d070..537b1a228e5 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -358,7 +358,6 @@ experimental == viewport_rule.html viewport_rule_ref.html
== whitespace_pre.html whitespace_pre_ref.html
== width_nonreplaced_block_simple_a.html width_nonreplaced_block_simple_b.html
== word_break_a.html word_break_ref.html
-== word_spacing_a.html word_spacing_ref.html
# This file must be sorted alphabetically.
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index d0b6512b141..ef9c5992923 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -99,6 +99,18 @@
"url": "/_mozilla/css/setpropertypriority.html"
}
],
+ "css/word-spacing.html": [
+ {
+ "path": "css/word-spacing.html",
+ "references": [
+ [
+ "/_mozilla/css/word-spacing-ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/word-spacing.html"
+ }
+ ],
"mozilla/canvas/drawimage_html_image_1.html": [
{
"path": "mozilla/canvas/drawimage_html_image_1.html",
@@ -860,6 +872,18 @@
"url": "/_mozilla/css/setpropertypriority.html"
}
],
+ "css/word-spacing.html": [
+ {
+ "path": "css/word-spacing.html",
+ "references": [
+ [
+ "/_mozilla/css/word-spacing-ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/word-spacing.html"
+ }
+ ],
"mozilla/canvas/drawimage_html_image_1.html": [
{
"path": "mozilla/canvas/drawimage_html_image_1.html",
diff --git a/tests/wpt/mozilla/tests/css/css/ahem.css b/tests/wpt/mozilla/tests/css/css/ahem.css
new file mode 100644
index 00000000000..51eede74aaa
--- /dev/null
+++ b/tests/wpt/mozilla/tests/css/css/ahem.css
@@ -0,0 +1,5 @@
+body {
+ font-family: 'ahem';
+ font-size: 100px;
+ line-height: 1;
+}
diff --git a/tests/ref/word_spacing_ref.html b/tests/wpt/mozilla/tests/css/word-spacing-ref.html
similarity index 100%
rename from tests/ref/word_spacing_ref.html
rename to tests/wpt/mozilla/tests/css/word-spacing-ref.html
diff --git a/tests/ref/word_spacing_a.html b/tests/wpt/mozilla/tests/css/word-spacing.html
similarity index 83%
rename from tests/ref/word_spacing_a.html
rename to tests/wpt/mozilla/tests/css/word-spacing.html
index 335c6c6142f..3e0e7b72699 100644
--- a/tests/ref/word_spacing_a.html
+++ b/tests/wpt/mozilla/tests/css/word-spacing.html
@@ -1,5 +1,6 @@
+