Own the Jest setup so the tests survive @wordpress/scripts 36

.github/workflows/jest.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v7
         with:
-          node-version: 20
+          node-version: 24
           cache: 'npm'
 
       - name: Install dependencies

jest.config.js

@@ -1,6 +1,20 @@
-const defaultConfig = require( '@wordpress/scripts/config/jest-unit.config.js' );
+const presetConfig = require( '@wordpress/jest-preset-default' );
 
 module.exports = {
-	...defaultConfig,
+	...presetConfig,
 	testPathIgnorePatterns: [ '/build/', '/node_modules/', '/vendor/' ],
+	/*
+	 * Babel is configured here rather than in a root config file, so the transform stays scoped to
+	 * the tests: a root Babel config would also apply to the webpack build.
+	 */
+	transform: {
+		'\\.[jt]sx?$': [
+			require.resolve( 'babel-jest' ),
+			{
+				presets: [
+					require.resolve( '@wordpress/babel-preset-default' ),
+				],
+			},
+		],
+	},
 };