diff --git a/tests/calendar.py b/tests/calendar.py
index <HASH>..<HASH> 100644
--- a/tests/calendar.py
+++ b/tests/calendar.py
@@ -29,7 +29,7 @@ class TestCalendar(unittest.TestCase):
             c = Calendar(fix)
             d = Calendar(str(c))
             self.assertEqual(c, d)
-            self.assertSequenceEqual(sorted(c.events), sorted(d.events))
+            self.assertEqual(c.events, d.events)
 
             e = Calendar(str(d))
             # cannot compare str(c) and str(d) because times are encoded differently
style in tests/calendar.py

Calendar.events is a Set instance