TypeError: React.act is not a function when using @testing-library/react with react@19

[MFaad1]

I encountered a TypeError: React.act is not a function while running tests with @testing-library/react. The error appears to be related to incompatibility between the @testing-library/react package and react@19.

pnpm add -D @testing-library/react @testing-library/jest-dom jest

Create a simple component:
// app/page.tsx
export default function Home() {
return

Testing

;
}

// app/page.test.tsx
import { render, screen } from '@testing-library/react';
import Home from './page';

describe('Home Page', () => {
it('renders the testing div', () => {
render();
const divElement = screen.getByText(/testing/i);
expect(divElement).toBeInTheDocument();
});
});