Izmjenjena struktura, dodan backand

web/node_modules/react-scripts/config/jest/babelTransform.js

@@ -0,0 +1,16 @@
+// @remove-file-on-eject
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const babelJest = require('babel-jest');
+
+module.exports = babelJest.createTransformer({
+  presets: [require.resolve('babel-preset-react-app')],
+  babelrc: false,
+});