diff --git a/.babelrc.js b/.babelrc.js
index d78766a2..c4bd7aab 100644
--- a/.babelrc.js
+++ b/.babelrc.js
@@ -7,4 +7,9 @@ module.exports = {
       },
     ],
   ],
+  env: {
+    test: {
+      plugins: [['@babel/plugin-proposal-private-property-in-object', { loose: true }]],
+    },
+  },
 };