Suppress BytesWarning

Author: AA-Turner

Lib/test/test_textwrap.py

@@ -9,6 +9,7 @@
 #
 
 import unittest
+from test.support import warnings_helper
 
 from textwrap import TextWrapper, wrap, fill, dedent, indent, shorten
 
@@ -769,7 +770,9 @@ def test_type_error(self):
         with self.assertRaisesRegex(TypeError, "expected str object, not"):
             dedent(0)
 
-        with self.assertRaisesRegex(TypeError, "expected str object, not"):
+        # Suppress BytesWarning
+        with (warnings_helper.check_warnings(('', BytesWarning), quiet=True),
+              self.assertRaisesRegex(TypeError, "expected str object, not")):
             dedent(b'')
 
     def assertUnchanged(self, text):