gh-112730: Make the test suite resilient to color-activation environment variables (#117672)

1 files changed, 3 insertions, 0 deletions

diff --git a/Lib/idlelib/idle_test/test_run.py b/Lib/idlelib/idle_test/test_run.py
index a38e43dcb9d..83ecbffa2a1 100644
--- a/Lib/idlelib/idle_test/test_run.py
+++ b/Lib/idlelib/idle_test/test_run.py
@@ -8,6 +8,7 @@ import unittest
 from unittest import mock
 import idlelib
 from idlelib.idle_test.mock_idle import Func
+from test.support import force_not_colorized
 
 idlelib.testing = True  # Use {} for executing test user code.
 
@@ -46,6 +47,7 @@ class ExceptionTest(unittest.TestCase):
                  "Did you mean: 'real'?\n"),
             )
 
+    @force_not_colorized
     def test_get_message(self):
         for code, exc, msg in self.data:
             with self.subTest(code=code):
@@ -57,6 +59,7 @@ class ExceptionTest(unittest.TestCase):
                     expect = f'{exc.__name__}: {msg}'
                     self.assertEqual(actual, expect)
 
+    @force_not_colorized
     @mock.patch.object(run, 'cleanup_traceback',
                        new_callable=lambda: (lambda t, e: None))
     def test_get_multiple_message(self, mock):