diff --git a/test/unit/mailer_test.rb b/test/unit/mailer_test.rb
index fa3b5516c..582e1bc6a 100644
--- a/test/unit/mailer_test.rb
+++ b/test/unit/mailer_test.rb
@@ -620,31 +620,35 @@ class MailerTest < ActiveSupport::TestCase
   end
 
   def test_reminders
-    Mailer.reminders(:days => 42)
-    assert_equal 1, ActionMailer::Base.deliveries.size
-    mail = last_email
-    assert mail.bcc.include?('dlopper@somenet.foo')
-    assert_mail_body_match 'Bug #3: Error 281 when updating a recipe (5 days late)', mail
-    assert_mail_body_match 'View all issues (2 open)', mail
-    assert_select_email do
-      assert_select 'a[href=?]',
-                    'http://localhost:3000/issues?assigned_to_id=me&set_filter=1&sort=due_date%3Aasc',
-                    :text => 'View all issues'
-      assert_select '/p:nth-last-of-type(1)', :text => 'View all issues (2 open)'
+    travel_to Date.today.to_time(:utc) do
+      Mailer.reminders(:days => 42)
+      assert_equal 1, ActionMailer::Base.deliveries.size
+      mail = last_email
+      assert mail.bcc.include?('dlopper@somenet.foo')
+      assert_mail_body_match 'Bug #3: Error 281 when updating a recipe (5 days late)', mail
+      assert_mail_body_match 'View all issues (2 open)', mail
+      assert_select_email do
+        assert_select 'a[href=?]',
+                      'http://localhost:3000/issues?assigned_to_id=me&set_filter=1&sort=due_date%3Aasc',
+                      :text => 'View all issues'
+        assert_select '/p:nth-last-of-type(1)', :text => 'View all issues (2 open)'
+      end
+      assert_equal '1 issue(s) due in the next 42 days', mail.subject
     end
-    assert_equal '1 issue(s) due in the next 42 days', mail.subject
   end
 
   def test_reminders_language_auto
     with_settings :default_language => 'fr' do
       user = User.find(3)
       user.update_attribute :language, ''
-      Mailer.reminders(:days => 42)
-      assert_equal 1, ActionMailer::Base.deliveries.size
-      mail = last_email
-      assert mail.bcc.include?('dlopper@somenet.foo')
-      assert_mail_body_match 'Bug #3: Error 281 when updating a recipe (En retard de 5 jours)', mail
-      assert_equal "1 demande(s) arrivent à échéance (42)", mail.subject
+      travel_to Date.today.to_time(:utc) do
+        Mailer.reminders(:days => 42)
+        assert_equal 1, ActionMailer::Base.deliveries.size
+        mail = last_email
+        assert mail.bcc.include?('dlopper@somenet.foo')
+        assert_mail_body_match 'Bug #3: Error 281 when updating a recipe (En retard de 5 jours)', mail
+        assert_equal "1 demande(s) arrivent à échéance (42)", mail.subject
+      end
     end
   end
 
@@ -665,13 +669,15 @@ class MailerTest < ActiveSupport::TestCase
   end
 
   def test_reminders_for_users
-    Mailer.reminders(:days => 42, :users => ['5'])
-    assert_equal 0, ActionMailer::Base.deliveries.size # No mail for dlopper
-    Mailer.reminders(:days => 42, :users => ['3'])
-    assert_equal 1, ActionMailer::Base.deliveries.size # No mail for dlopper
-    mail = last_email
-    assert mail.bcc.include?('dlopper@somenet.foo')
-    assert_mail_body_match 'Bug #3: Error 281 when updating a recipe (5 days late)', mail
+    travel_to Date.today.to_time(:utc) do
+      Mailer.reminders(:days => 42, :users => ['5'])
+      assert_equal 0, ActionMailer::Base.deliveries.size # No mail for dlopper
+      Mailer.reminders(:days => 42, :users => ['3'])
+      assert_equal 1, ActionMailer::Base.deliveries.size # No mail for dlopper
+      mail = last_email
+      assert mail.bcc.include?('dlopper@somenet.foo')
+      assert_mail_body_match 'Bug #3: Error 281 when updating a recipe (5 days late)', mail
+    end
   end
 
   def test_reminder_should_include_issues_assigned_to_groups
@@ -683,22 +689,24 @@ class MailerTest < ActiveSupport::TestCase
       group.users << user_dlopper
 
       Issue.update_all(:assigned_to_id => nil)
-      due_date = 10.days.from_now
-      Issue.update(1, :due_date => due_date, :assigned_to_id => user_dlopper.id)
-      Issue.update(2, :due_date => due_date, :assigned_to_id => group.id)
-      Issue.create!(:project_id => 1, :tracker_id => 1, :status_id => 1,
-                      :subject => 'Assigned to group', :assigned_to => group,
-                      :due_date => 5.days.from_now,
-                      :author_id => 2)
-      ActionMailer::Base.deliveries.clear
-
-      Mailer.reminders(:days => 7)
-      assert_equal 2, ActionMailer::Base.deliveries.size
-      assert_equal %w(dlopper@somenet.foo jsmith@somenet.foo), recipients
-      ActionMailer::Base.deliveries.each do |mail|
-        assert_mail_body_match '1 issue(s) that are assigned to you are due in the next 7 days::', mail
-        assert_mail_body_match 'Assigned to group (Due in 5 days)', mail
-        assert_mail_body_match "View all issues (#{mail.bcc.include?('dlopper@somenet.foo') ? 3 : 2} open)", mail
+      travel_to Date.today.to_time(:utc) do
+        due_date = 10.days.from_now
+        Issue.update(1, :due_date => due_date, :assigned_to_id => user_dlopper.id)
+        Issue.update(2, :due_date => due_date, :assigned_to_id => group.id)
+        Issue.create!(:project_id => 1, :tracker_id => 1, :status_id => 1,
+                        :subject => 'Assigned to group', :assigned_to => group,
+                        :due_date => 5.days.from_now,
+                        :author_id => 2)
+        ActionMailer::Base.deliveries.clear
+
+        Mailer.reminders(:days => 7)
+        assert_equal 2, ActionMailer::Base.deliveries.size
+        assert_equal %w(dlopper@somenet.foo jsmith@somenet.foo), recipients
+        ActionMailer::Base.deliveries.each do |mail|
+          assert_mail_body_match '1 issue(s) that are assigned to you are due in the next 7 days::', mail
+          assert_mail_body_match 'Assigned to group (Due in 5 days)', mail
+          assert_mail_body_match "View all issues (#{mail.bcc.include?('dlopper@somenet.foo') ? 3 : 2} open)", mail
+        end
       end
     end
   end
@@ -736,23 +744,25 @@ class MailerTest < ActiveSupport::TestCase
   end
 
   def test_reminders_should_sort_issues_by_due_date
-    user = User.find(2)
-    Issue.generate!(:assigned_to => user, :due_date => 2.days.from_now, :subject => 'quux')
-    Issue.generate!(:assigned_to => user, :due_date => 0.days.from_now, :subject => 'baz')
-    Issue.generate!(:assigned_to => user, :due_date => 1.days.from_now, :subject => 'qux')
-    Issue.generate!(:assigned_to => user, :due_date => -1.days.from_now, :subject => 'foo')
-    Issue.generate!(:assigned_to => user, :due_date => -1.days.from_now, :subject => 'bar')
-    ActionMailer::Base.deliveries.clear
+    travel_to Date.today.to_time(:utc) do
+      user = User.find(2)
+      Issue.generate!(:assigned_to => user, :due_date => 2.days.from_now, :subject => 'quux')
+      Issue.generate!(:assigned_to => user, :due_date => 0.days.from_now, :subject => 'baz')
+      Issue.generate!(:assigned_to => user, :due_date => 1.days.from_now, :subject => 'qux')
+      Issue.generate!(:assigned_to => user, :due_date => -1.days.from_now, :subject => 'foo')
+      Issue.generate!(:assigned_to => user, :due_date => -1.days.from_now, :subject => 'bar')
+      ActionMailer::Base.deliveries.clear
 
-    Mailer.reminders(:days => 7, :users => [user.id])
-    assert_equal 1, ActionMailer::Base.deliveries.size
-    assert_select_email do
-      assert_select 'li', 5
-      assert_select 'li:nth-child(1)', /foo \(1 day late\)/
-      assert_select 'li:nth-child(2)', /bar \(1 day late\)/
-      assert_select 'li:nth-child(3)', /baz \(Due in 0 days\)/
-      assert_select 'li:nth-child(4)', /qux \(Due in 1 day\)/
-      assert_select 'li:nth-child(5)', /quux \(Due in 2 days\)/
+      Mailer.reminders(:days => 7, :users => [user.id])
+      assert_equal 1, ActionMailer::Base.deliveries.size
+      assert_select_email do
+        assert_select 'li', 5
+        assert_select 'li:nth-child(1)', /foo \(1 day late\)/
+        assert_select 'li:nth-child(2)', /bar \(1 day late\)/
+        assert_select 'li:nth-child(3)', /baz \(Due in 0 days\)/
+        assert_select 'li:nth-child(4)', /qux \(Due in 1 day\)/
+        assert_select 'li:nth-child(5)', /quux \(Due in 2 days\)/
+      end
     end
   end