Using modules in babel

Switching back to running tests in production environment

package.json

@@ -17,7 +17,7 @@
     "build:webpack": "webpack --config webpack.prod.js",
     "build:prerender": "node ./script/__build__/prerender.js",
     "test": "run-s test:lint 'test:unit --coverage'",
-    "test:unit": "jest",
+    "test:unit": "cross-env NODE_ENV=production jest",
     "test:lint": "eslint --ignore-path .gitignore .",
     "test:watch": "yarn test:unit --watch",
     "i18n:scrub": "node ./script/i18n-scrub.js",
@@ -30,12 +30,7 @@
   ],
   "babel": {
     "presets": [
-      [
-        "env",
-        {
-          "modules": false
-        }
-      ],
+      "env",
       "react"
     ],
     "plugins": [
@@ -44,27 +39,7 @@
       "transform-object-rest-spread",
       "transform-decorators-legacy",
       "syntax-dynamic-import"
-    ],
-    "env": {
-      "test": {
-        "presets": [
-          [
-            "env",
-            {
-              "modules": "commonjs"
-            }
-          ],
-          "react"
-        ],
-        "plugins": [
-          "transform-runtime",
-          "transform-class-properties",
-          "transform-object-rest-spread",
-          "transform-decorators-legacy",
-          "syntax-dynamic-import"
-        ]
-      }
-    }
+    ]
   },
   "postcss": {
     "plugins": {