fix (race?) broken tests

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

test/app-tests/loading.js

@@ -16,6 +16,9 @@ limitations under the License.
 
 /* loading.js: test the myriad paths we have for loading the application */
 
+import PlatformPeg from 'matrix-react-sdk/lib/PlatformPeg';
+import Platform from '../../src/vector/platform';
+
 import 'skin-sdk';
 
 import React from 'react';
@@ -137,6 +140,8 @@ describe('loading:', function () {
             default_is_url: DEFAULT_IS_URL,
         }, opts.config || {});
 
+        PlatformPeg.set(new Platform());
+
         var params = parseQs(windowLocation);
         matrixChat = ReactDOM.render(
             <MatrixChat