Use babel config in alltheplaces

tests/convert-to-jest.js

@@ -77,8 +77,12 @@ utils.writeJSONFile(path.join(testSrc, 'tsconfig.json'), tsData);
   utils.run(`git rm -f ./test-${name}/${fname}`);
 });
 
-// Copy run.py from coreutils
+// Copy common files from coreutils
 fs.copySync(path.join(coreUtils, 'run.py'), path.join(testSrc, 'run.py'));
+fs.copySync(
+  path.join(coreUtils, 'run.py'),
+  path.join(testSrc, 'babel.config.js')
+);
 
 // Add new files to git
 utils.run(`git add ./test-${name}/run.py ./test-${name}/jest.config.js`);

tests/test-application/babel.config.js

@@ -1,12 +1 @@
-module.exports = {
-  presets: [
-    [
-      '@babel/preset-env',
-      {
-        targets: {
-          node: 'current'
-        }
-      }
-    ]
-  ]
-};
+module.exports = require('@jupyterlab/testutils/lib/jest-config');