From 3892799668dbf2b123a52780fd1d78f8880fdeb7 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Fri, 8 Sep 2017 15:44:33 -0700
Subject: [PATCH] [3.6] bpo-30822: Deduplicate ZoneInfoTest classes in
 test_datetime. (GH-2534) (#3405)

(cherry picked from commit 34b54873b51a1ebee2a3c57b7205537b4f33128d)
---
 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 2d00b56c1cc..d659f369d54 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