Existing Behat scenarios will confirm the search functionality being changed still works, here we can assert the debouncing now functions correctly when typing quickly: Log in as admin Navigate to Language > Language packs in site administration Quickly type a long string of characters into the Search field Confirm the Available language packs element only updates once you've finished typing Navigate to Reports from user menu Create a new report from Users report source Quickly type a long string of characters into the Search field Confirm the column list only updates once you've finished typing