From 34b54873b51a1ebee2a3c57b7205537b4f33128d Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sun, 2 Jul 2017 22:36:12 +0300
Subject: bpo-30822: Deduplicate ZoneInfoTest classes in test_datetime. (#2534)

---
 Lib/test/test_datetime.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Lib/test/test_datetime.py b/Lib/test/test_datetime.py
index 2d00b56..d659f36 100644
--- a/Lib/test/test_datetime.py
+++ b/Lib/test/test_datetime.py
@@ -32,6 +32,7 @@ for module, suffix in zip(test_modules, test_suffixes):
         elif issubclass(cls, unittest.TestSuite):
             suit = cls()
             test_classes.extend(type(test) for test in suit)
+    test_classes = sorted(set(test_classes), key=lambda cls: cls.__qualname__)
     for cls in test_classes:
         cls.__name__ += suffix
         cls.__qualname__ += suffix
-- 
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