diff --git a/lib/middleware/karma.js b/lib/middleware/karma.js
index 0f4eee3dd..a9186fa65 100644
--- a/lib/middleware/karma.js
+++ b/lib/middleware/karma.js
@@ -96,6 +96,11 @@ var createKarmaMiddleware = function (filesPromise, serveStaticFile,
       })
     }
 
+    // serve the favicon
+    if (requestUrl === '/favicon.ico') {
+      return serveStaticFile(requestUrl, response)
+    }
+
     // serve context.html - execution context within the iframe
     // or debug.html - execution context without channel to the server
     if (requestUrl === '/context.html' || requestUrl === '/debug.html') {