diff --git a/test/unit/ticket_test.rb b/test/unit/ticket_test.rb
index ff67e859e..b4b581abd 100644
--- a/test/unit/ticket_test.rb
+++ b/test/unit/ticket_test.rb
@@ -23,6 +23,13 @@ class TicketTest < ActiveSupport::TestCase
   end
 
   test 'ticket sla' do
+
+    # cleanup
+    delete = Sla.destroy_all
+    assert( delete, "sla destroy_all" )
+    delete = Ticket.destroy_all
+    assert( delete, "ticket destroy_all" )
+
     ticket = Ticket.create(
       :title           => 'some title äöüß',
       :group           => Group.lookup( :name => 'Users'),
diff --git a/test/unit/working_time_test.rb b/test/unit/working_time_test.rb
index 90f8cb124..abee11931 100644
--- a/test/unit/working_time_test.rb
+++ b/test/unit/working_time_test.rb
@@ -118,8 +118,8 @@ class WorkingTimeTest < ActiveSupport::TestCase
     ]
     tests.each { |test|
       TimeCalculation.config( test[:config] )
-      dest_time = TimeCalculation.dest_time( test[:start], test[:diff] )
-      assert_equal( dest_time, Time.parse( test[:dest_time] + ' UTC' ), 'dest time' )
+      dest_time = TimeCalculation.dest_time( test[:start] + ' UTC', test[:diff] )
+      assert_equal( dest_time.gmtime, Time.parse( test[:dest_time] + ' UTC' ), 'dest time' )
     }
   end