diff --git a/packages/react-scripts/config/jest/babelTransform.js b/packages/react-scripts/config/jest/babelTransform.js
index 8a613651..632ebbd7 100644
--- a/packages/react-scripts/config/jest/babelTransform.js
+++ b/packages/react-scripts/config/jest/babelTransform.js
@@ -32,6 +32,7 @@ module.exports = babelJest.createTransformer({
       },
     ],
   ],
+  plugins: ['@babel/plugin-transform-class-static-block'],
   babelrc: false,
   configFile: false,
 });
diff --git a/packages/react-scripts/scripts/utils/createJestConfig.js b/packages/react-scripts/scripts/utils/createJestConfig.js
index b35f83f8..ed964eda 100644
--- a/packages/react-scripts/scripts/utils/createJestConfig.js
+++ b/packages/react-scripts/scripts/utils/createJestConfig.js
@@ -56,6 +56,10 @@ module.exports = (resolve, rootDir, isEjecting) => {
     moduleNameMapper: {
       '^react-native$': 'react-native-web',
       '^.+\\.module\\.(css|sass|scss)$': 'identity-obj-proxy',
+      'vscode/vscode/vs/base/common/strings':
+        'vscode/vscode/src/vs/base/common/strings.js',
+      'vscode/vscode/vs/editor/common/diff/defaultLinesDiffComputer/defaultLinesDiffComputer':
+        'vscode/vscode/src/vs/editor/common/diff/defaultLinesDiffComputer/defaultLinesDiffComputer.js',
       ...(modules.jestAliases || {}),
     },
     moduleFileExtensions: [...paths.moduleFileExtensions, 'node'].filter(