--- a/devtools/client/webconsole/.babelrc
+++ b/devtools/client/webconsole/.babelrc
@@ -1,7 +1,7 @@
 {
   "env": {
     "test": {
-      "presets": ["es2015"]
+      "presets": ["es2015", "es2017"]
     }
   }
-}
\ No newline at end of file
+}

--- a/devtools/client/webconsole/package.json
+++ b/devtools/client/webconsole/package.json
@@ -7,16 +7,17 @@
   "scripts": {
     "start": "cross-env NODE_ENV=production node bin/dev-server",
     "dev": "node bin/dev-server",
     "test": "cross-env NODE_ENV=test NODE_PATH=../../../ mocha new-console-output/test/**/*.test.js --compilers js:babel-register -r jsdom-global/register -r ./new-console-output/test/require-helper.js"
   },
   "dependencies": {
     "amd-loader": "0.0.5",
     "babel-preset-es2015": "^6.6.0",
+    "babel-preset-es2017": "^6.24.1",
     "babel-register": "^6.24.0",
     "cross-env": "^3.1.3",
     "devtools-config": "0.0.12",
     "devtools-launchpad": "0.0.67",
     "devtools-modules": "0.0.28",
     "enzyme": "^2.4.1",
     "expect": "^1.16.0",
     "file-loader": "^0.10.1",