diff --git a/test/unit/person_notifier_test.rb b/test/unit/person_notifier_test.rb
index 4def2d5..1da1704 100644
--- a/test/unit/person_notifier_test.rb
+++ b/test/unit/person_notifier_test.rb
@@ -78,7 +78,7 @@ class PersonNotifierTest < ActiveSupport::TestCase
   should 'schedule next mail at notification time' do
     @member.notification_time = 12
     @member.notifier.schedule_next_notification_mail
-    assert_equal @member.notification_time, ((Delayed::Job.first.run_at - DateTime.now)/1.hour).round
+    assert_equal @member.notification_time, DateTime.now.hour - Delayed::Job.first.run_at.hour
   end
 
   should 'do not schedule duplicated notification mail' do
@@ -127,7 +127,7 @@ class PersonNotifierTest < ActiveSupport::TestCase
     @member.notification_time = 12
     @member.save!
     assert_equal 1, Delayed::Job.count
-    assert_equal @member.notification_time, ((Delayed::Job.first.run_at - DateTime.now)/1.hour).round
+    assert_equal @member.notification_time, DateTime.now.hour - Delayed::Job.first.run_at.hour
   end
 
   should 'display error message if fail to render a notificiation' do
diff --git a/test/unit/person_test.rb b/test/unit/person_test.rb
index 28f5a4f..d1d0060 100644
--- a/test/unit/person_test.rb
+++ b/test/unit/person_test.rb
@@ -1419,6 +1419,12 @@ class PersonTest < ActiveSupport::TestCase
     assert p.notifier.kind_of?(PersonNotifier)
   end
 
+  should 'reschedule next notification after update' do
+    p = fast_create(Person, :user_id => fast_create(User).id)
+    PersonNotifier.any_instance.expects(:reschedule_next_notification_mail).once
+    assert p.update_attribute(:name, 'Person name changed')
+  end
+
   should 'merge memberships of plugins to original memberships' do
     class Plugin1 < Noosfero::Plugin
       def person_memberships(person)
--
libgit2 0.21.2