Warning: The current testing environment is not configured to support act(...)

After updating from v15 to v16 of testing-library/react, I'm now getting this error in all of my tests - except the tests still pass just fine.

Warning: The current testing environment is not configured to support act(...)

The error goes away when I downgrade to v15. Since @testing-library/dom is now a peer dep, I tried installing that as well but the error remains.

• @testing-library/react version: 16
• Testing Framework and version: vitest, @testing-library/jest
• DOM Environment: jsdom 23.2.0, and I've tried upgrading this too. no change

With v15, here's what yarn why says (no warnings about act):

yarn why @testing-library/dom
├─ @storybook/testing-library@npm:0.1.0
│  └─ @testing-library/dom@npm:8.20.1 (via npm:^8.3.0)
│
├─ @testing-library/react@npm:15.0.7
│  └─ @testing-library/dom@npm:10.1.0 (via npm:^10.0.0)
│
└─ @testing-library/react@npm:15.0.7 [7cdc2]
   └─ @testing-library/dom@npm:10.1.0 (via npm:^10.0.0)

In 16 with dom added, here's what why says (warnings on act):

├─ @storybook/testing-library@npm:0.1.0
│  └─ @testing-library/dom@npm:8.20.1 (via npm:^8.3.0)
│
└─ tatsu@workspace:.
   └─ @testing-library/dom@npm:10.1.0 (via npm:^10.1.0)

Reproduce the warning with @testing-library/react 16 under Vitest, @testing-library/jest, and jsdom 23.2.0, then compare against 15.0.7 and the listed @testing-library/dom dependency trees. No source file or test is named; done means identifying and verifying a fix that removes the warning while keeping tests passing.