diff --git a/testing/web-platform/tests/html/semantics/forms/the-select-element/customizable-select/option-computed-style.tentative.html b/testing/web-platform/tests/html/semantics/forms/the-select-element/customizable-select/option-computed-style.tentative.html
index 14650f3f320ae..9c93096682950 100644
--- a/testing/web-platform/tests/html/semantics/forms/the-select-element/customizable-select/option-computed-style.tentative.html
+++ b/testing/web-platform/tests/html/semantics/forms/the-select-element/customizable-select/option-computed-style.tentative.html
@@ -11,7 +11,7 @@
 <script>
 test(() => {
   assert_equals(
-    getComputedStyle(document.querySelector('option'), '::before').content,
+    getComputedStyle(document.querySelector('option'), '::check').content,
     `"\u2713" / ""`);
 }, 'appearance:base-select options should have a checkmark with empty alt text.');
 </script>