Index: test_site.py
===================================================================
--- test_site.py	(revision 82365)
+++ test_site.py	(working copy)
@@ -112,12 +112,14 @@
         self.assertIn(usersite, sys.path)
 
         rc = subprocess.call([sys.executable, '-c',
-            'import sys; sys.exit(%r in sys.path)' % usersite])
+            'import sys; sys.exit(%r in sys.path)' % usersite],
+            env=os.environ)
         self.assertEqual(rc, 1, "%r is not in sys.path (sys.exit returned %r)"
                 % (usersite, rc))
 
         rc = subprocess.call([sys.executable, '-s', '-c',
-            'import sys; sys.exit(%r in sys.path)' % usersite])
+            'import sys; sys.exit(%r in sys.path)' % usersite],
+            env=os.environ)
         self.assertEqual(rc, 0)
 
         env = os.environ.copy()