diff --git a/scroll-to-text-fragment/sequential-focus.html b/scroll-to-text-fragment/sequential-focus.html
index 30b467f1ecd1a5..79b013ca229c66 100644
--- a/scroll-to-text-fragment/sequential-focus.html
+++ b/scroll-to-text-fragment/sequential-focus.html
@@ -24,21 +24,21 @@
             const link = document.getElementById('link');
             const nextButton = document.getElementById('next-button');
 
-            window.addEventListener('hashchange', async () => {
-                // Assert that the link element does not have focus initially
-                assert_not_equals(document.activeElement, link, 'Link element should not have focus initially');
+            const hashChange = new Promise(r => window.addEventListener('hashchange', r, { once: true }));
 
-                // Simulate pressing TAB to shift focus to the next element
-                await test_driver.send_keys(document.body, '\uE004'); // '\uE004' is the WebDriver key code for TAB
+            // Simulate a same-document load to the text fragment
+            location.hash = '#some-hash-to-trigger-hashchange:~:text=foo';
 
-                // Assert that the next focusable element (button) has focus
-                assert_equals(document.activeElement, nextButton, 'Next focusable element should have focus after pressing TAB');
+            await hashChange;
 
-                t.done();
-            });
+            // Assert that the link element does not have focus initially
+            assert_not_equals(document.activeElement, link, 'Link element should not have focus initially');
 
-            // Simulate a same-document load to the text fragment
-            location.hash = '#some-hash-to-trigger-hashchange:~:text=foo';
+            // Simulate pressing TAB to shift focus to the next element
+            await test_driver.send_keys(document.body, '\uE004'); // '\uE004' is the WebDriver key code for TAB
+
+            // Assert that the next focusable element (button) has focus
+            assert_equals(document.activeElement, nextButton, 'Next focusable element should have focus after pressing TAB');
         }, 'Text Fragment focus behavior');
     </script>
 </body>