From 7ca63cb7cc0ea962f40559ba57f767e38d7f1af7 Mon Sep 17 00:00:00 2001
From: Brett Cannon <brett@python.org>
Date: Sat, 16 Jul 2016 10:44:13 -0700
Subject: Fix regressions introduced by fixes for issue #27083.

---
 Lib/test/test_importlib/util.py | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'Lib/test/test_importlib/util.py')

diff --git a/Lib/test/test_importlib/util.py b/Lib/test/test_importlib/util.py
index ce20377f8c9..43896c50000 100644
--- a/Lib/test/test_importlib/util.py
+++ b/Lib/test/test_importlib/util.py
@@ -378,3 +378,12 @@ def mock_path_hook(*entries, importer):
             raise ImportError
         return importer
     return hook
+
+
+class CASEOKTestBase:
+
+    def caseok_env_changed(self, *, should_exist):
+        possibilities = b'PYTHONCASEOK', 'PYTHONCASEOK'
+        if any(x in self.importlib._bootstrap_external._os.environ
+                    for x in possibilities) != should_exist:
+            self.skipTest('os.environ changes not reflected in _os.environ')
-- 
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