We originally used test-tube emoji for EWS status bubbles for tester queues (in https://commits.webkit.org/r249483). But at that time, this emoji was new and last OS (Mojave) didn't support this emoji. Now that it has been few years, we should be able to use test-tube emoji.
Created attachment 428003 [details]
Committed r277180 (237465@main): <https://commits.webkit.org/237465@main>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 428003 [details].