diff --git a/test/test_icalparser.py b/test/test_icalparser.py
index 3108e17..e02b6bc 100644
--- a/test/test_icalparser.py
+++ b/test/test_icalparser.py
@@ -27,6 +27,12 @@ class ICalParserTests(unittest.TestCase):
         self.assertTrue(type(n) == datetime, "result of now has type datetime")
         self.assertTrue(n.tzinfo, "result of now has a timezone info")
 
+    def test_time_left(self):
+        dt = datetime(year=2017, month=2, day=2, hour=11, minute=2, tzinfo=utc)
+        time_left = self.eventA.time_left(time=dt)
+        self.assertEqual(time_left.days, 1)
+        self.assertEqual(time_left.seconds, 3780)
+
     def test_event_copy_to(self):
         new_start = utc.normalize(datetime(year=2017, month=2, day=5, hour=12, minute=5, tzinfo=utc))
         eventC = self.eventA.copy_to(new_start)
@@ -34,9 +40,16 @@ class ICalParserTests(unittest.TestCase):
         self.assertNotEqual(eventC.uid, self.eventA.uid, "new event has new UID")
         self.assertEqual(eventC.start, new_start, "new event has new start")
         self.assertEqual(eventC.end - eventC.start, self.eventA.end - self.eventA.start, "new event has same duration")
-        self.assertEqual(eventC.all_day , False, "new event is no all day event")
+        self.assertEqual(eventC.all_day, False, "new event is no all day event")
         self.assertEqual(eventC.summary, self.eventA.summary, "copy to: summary")
 
+        eventD = eventC.copy_to()
+        self.assertNotEqual(eventD.uid, eventC.uid, "new event has new UID")
+        self.assertEqual(eventD.start, eventC.start, "new event has same start")
+        self.assertEqual(eventD.end, eventC.end, "new event has same end")
+        self.assertEqual(eventD.all_day, eventC.all_day, "new event is no all day event")
+        self.assertEqual(eventD.summary, eventC.summary, "copy to: summary")
+
     def test_event_order(self):
         self.assertTrue(self.eventA > self.eventB, "order of events")