diff --git a/testem.js b/testem.js
index b3799ce1..63eba84f 100644
--- a/testem.js
+++ b/testem.js
@@ -1,3 +1,7 @@
+'use strict';
+
+/* eslint-env node */
+
 module.exports = {
   test_page: 'tests/index.html?hidepassed',
   disable_watching: true,
@@ -11,11 +15,14 @@ module.exports = {
     Chrome: {
       mode: 'ci',
       args: [
+        // --no-sandbox is needed when running Chrome inside a container
+        process.env.TRAVIS ? '--no-sandbox' : null,
+
         '--disable-gpu',
         '--headless',
         '--remote-debugging-port=0',
         '--window-size=1440,900'
-      ]
+      ].filter(Boolean)
     }
   }
 };