diff --git a/test/common/algos.mocha.js b/test/common/algos.mocha.js
index ba96498284..8131f24f0f 100644
--- a/test/common/algos.mocha.js
+++ b/test/common/algos.mocha.js
@@ -1140,6 +1140,64 @@ describe('Cron', () => {
     });
   });
 
+  describe('delete old completed todos', () => {
+    it('after 30 days for free users', () => {
+      let user = generateUser();
+      user.lastCron = moment().subtract(2, 'days');
+      expect(user.todos.length).to.equal(0);
+
+      let completedTodo = generateTodo();
+      completedTodo.text = 'completed todo';
+      completedTodo.completed = true;
+      completedTodo.dateCompleted = moment().subtract(32, 'days').toDate();
+      let recentCompletedTodo = generateTodo();
+      recentCompletedTodo.text = 'recent completed todo';
+      recentCompletedTodo.completed = true;
+      recentCompletedTodo.dateCompleted = moment().subtract(12, 'days').toDate();
+
+      let uncompletedTodo = generateTodo();
+      uncompletedTodo.text = 'uncompleted todo';
+      uncompletedTodo.dateCreated = moment().subtract(32, 'days').toDate();
+
+      user.todos.push(uncompletedTodo, completedTodo, recentCompletedTodo);
+      expect(user.todos.length).to.equal(3);
+
+      user.fns.cron();
+      expect(user.todos.length).to.equal(2);
+      expect(user.todos[0].text).to.equal('uncompleted todo');
+      expect(user.todos[1].text).to.equal('recent completed todo');
+    });
+
+    it('after 90 days for subscribers', () => {
+      let user = generateUser();
+      user.lastCron = moment().subtract(2, 'days');
+      user.purchased = {plan: {customerId: 1}};
+
+      expect(user.todos.length).to.equal(0);
+
+      let completedTodo = generateTodo();
+      completedTodo.text = 'completed todo';
+      completedTodo.completed = true;
+      completedTodo.dateCompleted = moment().subtract(92, 'days').toDate();
+      let recentCompletedTodo = generateTodo();
+      recentCompletedTodo.text = 'recent completed todo';
+      recentCompletedTodo.completed = true;
+      recentCompletedTodo.dateCompleted = moment().subtract(32, 'days').toDate();
+
+      let uncompletedTodo = generateTodo();
+      uncompletedTodo.text = 'uncompleted todo';
+      uncompletedTodo.dateCreated = moment().subtract(32, 'days').toDate();
+
+      user.todos.push(uncompletedTodo, completedTodo, recentCompletedTodo);
+      expect(user.todos.length).to.equal(3);
+
+      user.fns.cron();
+      expect(user.todos.length).to.equal(2);
+      expect(user.todos[0].text).to.equal('uncompleted todo');
+      expect(user.todos[1].text).to.equal('recent completed todo');
+    });
+  });
+
   describe('cron day calculations', () => {
     let dayStart = 4;
     let fstr = 'YYYY-MM-DD HH: mm: ss';