diff --git a/test/app-tests/loading.js b/test/app-tests/loading.js
index 80fcc0202b..a323a26269 100644
--- a/test/app-tests/loading.js
+++ b/test/app-tests/loading.js
@@ -121,14 +121,17 @@ describe('loading:', function () {
 
         const MatrixChat = sdk.getComponent('structures.MatrixChat');
         const fragParts = parseQsFromFragment(windowLocation);
+
+        const config = Object.assign({
+            default_hs_url: DEFAULT_HS_URL,
+            default_is_url: DEFAULT_IS_URL,
+        }, opts.config || {});
+
         var params = parseQs(windowLocation);
         matrixChat = ReactDOM.render(
             <MatrixChat
                 onNewScreen={onNewScreen}
-                config={{
-                    default_hs_url: DEFAULT_HS_URL,
-                    default_is_url: DEFAULT_IS_URL,
-                }}
+                config={config}
                 realQueryParams={params}
                 startingFragmentQueryParams={fragParts.params}
                 enableGuest={true}
@@ -318,6 +321,40 @@ describe('loading:', function () {
             }).done(done, done);
         });
 
+        it("logs in correctly with a Riot Team Server", function() {
+            sdk.setFetch(httpBackend.fetchFn); // XXX: ought to restore this!
+
+            httpBackend.when('GET', '/pushrules').respond(200, {});
+            httpBackend.when('POST', '/filter').respond(200, { filter_id: 'fid' });
+
+            loadApp({
+                config: {
+                    teamServerConfig: {
+                        teamServerURL: 'http://my_team_server',
+                    },
+                },
+            });
+
+            return q.delay(1).then(() => {
+                // we expect a loading spinner while we log into the RTS
+                assertAtLoadingSpinner(matrixChat);
+
+                httpBackend.when('GET', 'my_team_server/login').respond(200, {
+                    team_token: 'nom',
+                });
+                return httpBackend.flush();
+            }).then(() => {
+                return awaitSyncingSpinner(matrixChat)
+            }).then(() => {
+                // we got a sync spinner - let the sync complete
+                return expectAndAwaitSync();
+            }).then(() => {
+                // once the sync completes, we should have a home page
+                ReactTestUtils.findRenderedComponentWithType(
+                    matrixChat, sdk.getComponent('structures.HomePage'));
+            });
+        });
+
         describe('/#/login link:', function() {
             beforeEach(function() {
                 loadApp({
diff --git a/test/mock-request.js b/test/mock-request.js
index 0ebabb038c..cddeb1aeee 100644
--- a/test/mock-request.js
+++ b/test/mock-request.js
@@ -30,6 +30,33 @@ function HttpBackend() {
             abort: abort,
         };
     };
+
+    // very simplistic mapping from the whatwg fetch interface onto the request
+    // interface, so we can use the same mock backend for both.
+    this.fetchFn = function(input, init) {
+        init = init || {};
+        const requestOpts = {
+            uri: input,
+            method: init.method || 'GET',
+            body: init.body,
+        };
+
+        return new Promise((resolve, reject) => {
+            function callback(err, response, body) {
+                if (err) {
+                    reject(err);
+                }
+                resolve({
+                    ok: response.statusCode >= 200 && response.statusCode < 300,
+                    json: () => body,
+                });
+            };
+
+            const req = new Request(requestOpts, callback);
+            console.log(`HTTP backend received request: ${req}`);
+            self.requests.push(req);
+        });
+    };
 }
 HttpBackend.prototype = {
     /**