Merge for #27083

1 files changed, 6 insertions, 8 deletions

diff --git a/Lib/test/test_importlib/extension/test_case_sensitivity.py b/Lib/test/test_importlib/extension/test_case_sensitivity.py
index b74e900..0dd9c86 100644
--- a/Lib/test/test_importlib/extension/test_case_sensitivity.py
+++ b/Lib/test/test_importlib/extension/test_case_sensitivity.py
@@ -4,12 +4,13 @@ import unittest
 
 from .. import util
 
+importlib = util.import_importlib('importlib')
 machinery = util.import_importlib('importlib.machinery')
 
 
 @unittest.skipIf(util.EXTENSIONS.filename is None, '_testcapi not available')
 @util.case_insensitive_tests
-class ExtensionModuleCaseSensitivityTest:
+class ExtensionModuleCaseSensitivityTest(util.CASEOKTestBase):
 
     def find_module(self):
         good_name = util.EXTENSIONS.name
@@ -23,25 +24,22 @@ class ExtensionModuleCaseSensitivityTest:
     def test_case_sensitive(self):
         with support.EnvironmentVarGuard() as env:
             env.unset('PYTHONCASEOK')
-            if b'PYTHONCASEOK' in _bootstrap_external._os.environ:
-                self.skipTest('os.environ changes not reflected in '
-                              '_os.environ')
+            self.caseok_env_changed(should_exist=False)
             loader = self.find_module()
             self.assertIsNone(loader)
 
     def test_case_insensitivity(self):
         with support.EnvironmentVarGuard() as env:
             env.set('PYTHONCASEOK', '1')
-            if b'PYTHONCASEOK' not in _bootstrap_external._os.environ:
-                self.skipTest('os.environ changes not reflected in '
-                              '_os.environ')
+            self.caseok_env_changed(should_exist=True)
             loader = self.find_module()
             self.assertTrue(hasattr(loader, 'load_module'))
 
 
 (Frozen_ExtensionCaseSensitivity,
  Source_ExtensionCaseSensitivity
- ) = util.test_both(ExtensionModuleCaseSensitivityTest, machinery=machinery)
+ ) = util.test_both(ExtensionModuleCaseSensitivityTest, importlib=importlib,
+                    machinery=machinery)
 
 
 if __name__ == '__main__':