Improves the ability to build in CI (GH-5728)

1 files changed, 5 insertions, 5 deletions

diff --git a/Lib/test/test_cmd_line.py b/Lib/test/test_cmd_line.py
index a6b663403f..fe89e3c0ee 100644
--- a/Lib/test/test_cmd_line.py
+++ b/Lib/test/test_cmd_line.py
@@ -63,6 +63,8 @@ class CmdLineTest(unittest.TestCase):
         rc, out, err = assert_python_ok('-vv')
         self.assertNotIn(b'stack overflow', err)
 
+    @unittest.skipIf(interpreter_requires_environment(),
+                     'Cannot run -E tests when PYTHON env vars are required.')
     def test_xoptions(self):
         def get_xoptions(*args):
             # use subprocess module directly because test.support.script_helper adds
@@ -278,11 +280,7 @@ class CmdLineTest(unittest.TestCase):
 
     def test_displayhook_unencodable(self):
         for encoding in ('ascii', 'latin-1', 'utf-8'):
-            # We are testing a PYTHON environment variable here, so we can't
-            # use -E, -I, or script_helper (which uses them).  So instead we do
-            # poor-man's isolation by deleting the PYTHON vars from env.
-            env = {key:value for (key,value) in os.environ.copy().items()
-                   if not key.startswith('PYTHON')}
+            env = os.environ.copy()
             env['PYTHONIOENCODING'] = encoding
             p = subprocess.Popen(
                 [sys.executable, '-i'],
@@ -704,6 +702,8 @@ class CmdLineTest(unittest.TestCase):
         self.assertEqual(proc.returncode, 0, proc)
 
 
+@unittest.skipIf(interpreter_requires_environment(),
+                 'Cannot run -I tests when PYTHON env vars are required.')
 class IgnoreEnvironmentTest(unittest.TestCase):
 
     def run_ignoring_vars(self, predicate, **env_vars):