diff --git a/tests/css/parser/declarations-valid-15.css b/tests/css/parser/declarations-valid-15.css
index b2c3cdee62..5e84be0790 100644
--- a/tests/css/parser/declarations-valid-15.css
+++ b/tests/css/parser/declarations-valid-15.css
@@ -1 +1 @@
-* { padding: 5 10 }
+* { padding: 5px 10px }
diff --git a/tests/css/parser/declarations-valid-15.ref.css b/tests/css/parser/declarations-valid-15.ref.css
index a6aa976aa3..9d00d04c86 100644
--- a/tests/css/parser/declarations-valid-15.ref.css
+++ b/tests/css/parser/declarations-valid-15.ref.css
@@ -1,6 +1,6 @@
 * {
-  padding-bottom: 5;
-  padding-left: 10;
-  padding-right: 10;
-  padding-top: 5;
+  padding-bottom: 5px;
+  padding-left: 10px;
+  padding-right: 10px;
+  padding-top: 5px;
 }