diff --git a/browser/components/loop/standalone/package.json b/browser/components/loop/standalone/package.json
index b7214f8c5a39..e84242bcc6f4 100644
--- a/browser/components/loop/standalone/package.json
+++ b/browser/components/loop/standalone/package.json
@@ -14,7 +14,7 @@
   "devDependencies": {
     "eslint": "0.20.x",
     "eslint-plugin-react": "2.2.x",
-    "express": "3.x"
+    "express": "4.x"
   },
   "scripts": {
     "test": "make test",
diff --git a/browser/components/loop/standalone/server.js b/browser/components/loop/standalone/server.js
index 8288be44738f..bec565736145 100644
--- a/browser/components/loop/standalone/server.js
+++ b/browser/components/loop/standalone/server.js
@@ -13,10 +13,16 @@ var express = require('express');
 var app = express();
 
 var port = process.env.PORT || 3000;
-var loopServerPort = process.env.LOOP_SERVER_PORT || 5000;
 var feedbackApiUrl = process.env.LOOP_FEEDBACK_API_URL ||
                      "https://input.allizom.org/api/v1/feedback";
 var feedbackProductName = process.env.LOOP_FEEDBACK_PRODUCT_NAME || "Loop";
+var loopServerUrl = process.env.LOOP_SERVER_URL || "http://localhost:5000";
+
+// Remove trailing slashes as double slashes in the url can confuse the server
+// responses.
+if (loopServerUrl[loopServerUrl.length - 1] === "/") {
+  loopServerUrl = loopServerUrl.slice(0, -1);
+}
 
 function getConfigFile(req, res) {
   "use strict";
@@ -25,7 +31,7 @@ function getConfigFile(req, res) {
   res.send([
     "var loop = loop || {};",
     "loop.config = loop.config || {};",
-    "loop.config.serverUrl = 'http://localhost:" + loopServerPort + "/v0';",
+    "loop.config.serverUrl = '" + loopServerUrl + "/v0';",
     "loop.config.feedbackApiUrl = '" + feedbackApiUrl + "';",
     "loop.config.feedbackProductName = '" + feedbackProductName + "';",
     // XXX Update with the real marketplace url once the FxOS Loop app is
@@ -54,7 +60,6 @@ app.get('/content/c/config.js', getConfigFile);
 // /ui - for the ui showcase
 // /content - for the standalone files.
 
-app.use('/test', express.static(__dirname + '/../test'));
 app.use('/ui', express.static(__dirname + '/../ui'));
 
 // This exists exclusively for the unit tests. They are served the
@@ -71,6 +76,10 @@ app.use('/content', express.static(__dirname + '/../content'));
 app.use('/content/c', express.static(__dirname + '/content'));
 app.use('/content/c', express.static(__dirname + '/../content'));
 
+// Two lines for the same reason as /content above.
+app.use('/test', express.static(__dirname + '/test'));
+app.use('/test', express.static(__dirname + '/../test'));
+
 // As we don't have hashes on the urls, the best way to serve the index files
 // appears to be to be to closely filter the url and match appropriately.
 function serveIndex(req, res) {
diff --git a/browser/components/loop/test/functional/config.py b/browser/components/loop/test/functional/config.py
index 940ef234419e..5441c5bd4a56 100644
--- a/browser/components/loop/test/functional/config.py
+++ b/browser/components/loop/test/functional/config.py
@@ -1,8 +1,9 @@
 # Loop server configuration
 CONTENT_SERVER_PORT = 3001
 LOOP_SERVER_PORT = 5001
+LOOP_SERVER_URL = "http://localhost:" + str(LOOP_SERVER_PORT)
 FIREFOX_PREFERENCES = {
-    "loop.server": "http://localhost:" + str(LOOP_SERVER_PORT),
+    "loop.server": LOOP_SERVER_URL + "/v0",
     "browser.dom.window.dump.enabled": True,
     # Some more changes might be necesarry to have this working in offline mode
     "media.peerconnection.default_iceservers": "[]",
diff --git a/browser/components/loop/test/functional/serversetup.py b/browser/components/loop/test/functional/serversetup.py
index cbda74141ae3..2e7cc1d34067 100644
--- a/browser/components/loop/test/functional/serversetup.py
+++ b/browser/components/loop/test/functional/serversetup.py
@@ -21,7 +21,7 @@
 # Set PORT so that it does not interfere with any other
 # development server that might be running
 CONTENT_SERVER_ENV.update({"PORT": str(CONTENT_SERVER_PORT),
-                           "LOOP_SERVER_PORT": str(LOOP_SERVER_PORT)})
+                           "LOOP_SERVER_URL": LOOP_SERVER_URL})
 
 ROOMS_WEB_APP_URL = "http://localhost:" + str(CONTENT_SERVER_PORT) + \
   "/content/{token}"
@@ -32,7 +32,7 @@
 # development server that might be running
 LOOP_SERVER_ENV.update({"NODE_ENV": "dev",
                         "PORT": str(LOOP_SERVER_PORT),
-                        "SERVER_ADDRESS": "localhost:" + str(LOOP_SERVER_PORT),
+                        "SERVER_ADDRESS": LOOP_SERVER_URL,
                         "ROOMS_WEB_APP_URL": ROOMS_WEB_APP_URL})