diff --git a/apps/files_sharing/webpack.js b/apps/files_sharing/webpack.js
index 3dd6d833f2..4b641329ec 100644
--- a/apps/files_sharing/webpack.js
+++ b/apps/files_sharing/webpack.js
@@ -32,7 +32,7 @@ module.exports = {
 				loader: 'babel-loader',
 				exclude: /node_modules/,
 				options: {
-					plugins: ['@babel/plugin-syntax-dynamic-import']
+					plugins: ['@babel/plugin-syntax-dynamic-import', 'transform-es2015-arrow-functions']
 				}
 			},
 			{
diff --git a/core/js/tests/specHelper.js b/core/js/tests/specHelper.js
index 45a0f04db0..5d4a7b81b5 100644
--- a/core/js/tests/specHelper.js
+++ b/core/js/tests/specHelper.js
@@ -90,7 +90,8 @@ window.oc_isadmin = false;
 // FIXME: oc_webroot is supposed to be only the path!!!
 window.oc_webroot = location.href + '/';
 window.oc_appswebroots = {
-	"files": window.oc_webroot + '/apps/files/'
+	"files": window.oc_webroot + '/apps/files/',
+	"files_sharing": window.oc_webroot + '/apps/files_sharing/'
 };
 window.oc_config = {
 	session_lifetime: 600 * 1000,
diff --git a/package-lock.json b/package-lock.json
index 125106b686..11bf025199 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1252,6 +1252,33 @@
         "util.promisify": "^1.0.0"
       }
     },
+    "babel-plugin-transform-es2015-arrow-functions": {
+      "version": "6.22.0",
+      "resolved": "https://registry.npmjs.org/babel-plugin-transform-es2015-arrow-functions/-/babel-plugin-transform-es2015-arrow-functions-6.22.0.tgz",
+      "integrity": "sha1-RSaSy3EdX3ncf4XkQM5BufJE0iE=",
+      "dev": true,
+      "requires": {
+        "babel-runtime": "^6.22.0"
+      }
+    },
+    "babel-runtime": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.26.0.tgz",
+      "integrity": "sha1-llxwWGaOgrVde/4E/yM3vItWR/4=",
+      "dev": true,
+      "requires": {
+        "core-js": "^2.4.0",
+        "regenerator-runtime": "^0.11.0"
+      },
+      "dependencies": {
+        "regenerator-runtime": {
+          "version": "0.11.1",
+          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
+          "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==",
+          "dev": true
+        }
+      }
+    },
     "backbone": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/backbone/-/backbone-1.4.0.tgz",
diff --git a/package.json b/package.json
index 728704a033..8c63f72320 100644
--- a/package.json
+++ b/package.json
@@ -64,6 +64,7 @@
     "@babel/plugin-syntax-dynamic-import": "^7.2.0",
     "@babel/preset-env": "^7.3.4",
     "babel-loader": "^8.0.5",
+    "babel-plugin-transform-es2015-arrow-functions": "^6.22.0",
     "css-loader": "^2.1.0",
     "exports-loader": "^0.7.0",
     "file-loader": "^3.0.1",
diff --git a/tests/karma.config.js b/tests/karma.config.js
index 81627abba0..e86f3d397b 100644
--- a/tests/karma.config.js
+++ b/tests/karma.config.js
@@ -54,7 +54,7 @@ module.exports = function(config) {
 					// up with the global namespace/classes/state
 					'apps/files_sharing/js/app.js',
 					'apps/files_sharing/js/sharedfilelist.js',
-					'apps/files_sharing/js/additionalScripts.js',
+					'apps/files_sharing/js/dist/additionalScripts.js',
 					'apps/files_sharing/js/public.js',
 					'apps/files_sharing/js/files_drop.js',
 					'apps/files_sharing/js/templates.js',