Fix tests when running with FORCE_COLOR=1

Author: hugovk

Lib/test/test_exceptions.py

@@ -2274,6 +2274,7 @@ def test_range_of_offsets(self):
                     self.assertIn(expected, err.getvalue())
                     the_exception = exc
 
+    @force_not_colorized
     def test_subclass(self):
         class MySyntaxError(SyntaxError):
             pass

Lib/test/test_unittest/test_result.py

@@ -1,13 +1,15 @@
 import io
 import sys
 import textwrap
-
-from test.support import warnings_helper, captured_stdout
-
 import traceback
 import unittest
 from unittest.util import strclass
-from test.support import force_not_colorized
+from test.support import warnings_helper
+from test.support import (
+    captured_stdout,
+    force_not_colorized,
+    force_not_colorized_test_class,
+)
 from test.test_unittest.support import BufferedWriter
 
 
@@ -772,6 +774,7 @@ def testFoo(self):
         runner.run(Test('testFoo'))
 
 
+@force_not_colorized_test_class
 class TestOutputBuffering(unittest.TestCase):
 
     def setUp(self):