Admin: fix reducer tests

app/soapbox/reducers/__tests__/admin-test.js

@@ -1,11 +1,13 @@
 import reducer from '../admin';
-import { fromJS } from 'immutable';
+import { Map as ImmutableMap, OrderedSet as ImmutableOrderedSet, fromJS } from 'immutable';
 
 describe('admin reducer', () => {
   it('should return the initial state', () => {
     expect(reducer(undefined, {})).toEqual(fromJS({
       reports: [],
       open_report_count: 0,
+      users: ImmutableMap(),
+      awaitingApproval: ImmutableOrderedSet(),
     }));
   });
 });