When testing, code that causes React state updates should be wrapped into act(...):
act(() => {
 /* fire events that update state */
});
/* assert on the output */
This ensures that you're testing the behavior the user would see in the browser. Learn more at https://reactjs.org/link/wrap-tests-with-act%s Manager 
 at Manager (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/@blueprintjs_core.js?v=19bc5f46:16758:24)
 at Popover (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/@blueprintjs_core.js?v=19bc5f46:18798:5)
 at div
 at div
 at InputOverlay (http://localhost:63315/app/components/overlays/overlays.tsx:165:32)
 at SelectInput (http://localhost:63315/app/components/forms/inputs/selects/selects.tsx:285:3)
 at div
 at header
 at CalendarHeader (http://localhost:63315/app/components/forms/inputs/date/date.tsx:118:3)
 at div
 at div
 at div
 at CalendarContainer (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/react-datepicker.js?v=19bc5f46:7267:16)
 at Wrap (http://localhost:63315/app/components/forms/inputs/date/date.tsx:64:19)
 at div
 at ClickOutsideWrapper (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/react-datepicker.js?v=19bc5f46:7292:22)
 at Calendar2 (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/react-datepicker.js?v=19bc5f46:9862:26)
 at div
 at div
 at TabLoop2 (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/react-datepicker.js?v=19bc5f46:10477:26)
 at Portal2 (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/react-datepicker.js?v=19bc5f46:10440:26)
 at PopperComponent2 (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/react-datepicker.js?v=19bc5f46:10532:40)
 at WithFloating (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/react-datepicker.js?v=19bc5f46:10515:35)
 at DatePicker2 (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/react-datepicker.js?v=19bc5f46:10590:26)
 at DateInput (http://localhost:63315/app/components/forms/inputs/date/date.tsx:222:3)
 at div
 at DateTimeInput (http://localhost:63315/app/components/forms/inputs/date-time/date-time.tsx:26:3)
 at form
 at FormProvider (http://localhost:63315/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/deps/chunk-OEVTHLDK.js?v=19bc5f46:114:11)
 at Form (http://localhost:63315/app/components/forms/forms.tsx:59:3)
 at DateTimeInputForm (http://localhost:63315/redacted/app/components/forms/inputs/date-time/tests/date-time.spec.tsx?import&browserv=1758221332900:19:3)

const DateTimeInputForm = ({ name, onSubmit, required, ...props }: DateTimeInputTestProps): React.JSX.Element => {
 const schema = z.object({
 [name]: zodDateTimeSchema({
 required
 })
 })
 const methods = useForm(schema)
 return (
 <Form methods={methods} onSubmit={onSubmit} schema={schema}>
 <DateTimeInput name={name} required={required} {...props} />
 </Form>
 )
}
describe('inputs - date-time', () => {
 it('does not error when valid', async () => {
 const user = userEvent.setup()
 render(<DateTimeInputForm includeSeconds label='Test' name='test' required />)
 const inputs = document.querySelectorAll('input')
 expect(inputs).toHaveLength(4)
 await user.click(inputs[0])
 await user.keyboard('2001-01-01')
 await user.tab() // < removing this line avoids the error (but we have further logic after this we want to test)
 expect(document.querySelector('input[class*="error"]')).toBeFalsy()
 })
})