Fix shutil.which() test for issue #16993.
diff --git a/Doc/library/shutil.rst b/Doc/library/shutil.rst
index b5f39fe..a1457d0 100644
--- a/Doc/library/shutil.rst
+++ b/Doc/library/shutil.rst
@@ -335,7 +335,7 @@
    directories.  For example, on Windows::
 
       >>> shutil.which("python")
-      'C:\\Python33\\python.exe'
+      'C:\\Python33\\python.EXE'
 
    .. versionadded:: 3.3
 
diff --git a/Lib/test/test_shutil.py b/Lib/test/test_shutil.py
index 6ae051b..bfd0fb5 100644
--- a/Lib/test/test_shutil.py
+++ b/Lib/test/test_shutil.py
@@ -1318,7 +1318,7 @@
         # Ask for the file without the ".exe" extension, then ensure that
         # it gets found properly with the extension.
         rv = shutil.which(self.temp_file.name[:-4], path=self.dir)
-        self.assertEqual(rv, self.temp_file.name[:-4] + ".exe")
+        self.assertEqual(rv, self.temp_file.name[:-4] + ".EXE")
 
 
 class TestMove(unittest.TestCase):