diff --git a/testsuite/css/parser/meson.build b/testsuite/css/parser/meson.build
index 380489427c..6440d43224 100644
--- a/testsuite/css/parser/meson.build
+++ b/testsuite/css/parser/meson.build
@@ -374,6 +374,8 @@ test_data = [
   'not-unclosed.ref.css',
   'nth-child.css',
   'nth-child.ref.css',
+  'number-values.css',
+  'number-values.ref.css',
   'opacity.css',
   'opacity.ref.css',
   'outline-color.css',