--- a/tests/test-util.py	Sun Feb 20 14:52:40 2022 -0700
+++ b/tests/test-util.py	Sun Feb 20 15:03:26 2022 -0700
@@ -2,6 +2,7 @@
 from __future__ import absolute_import
 
 import contextlib
+import io
 import itertools
 import unittest
 
@@ -55,7 +56,7 @@
 
 @contextlib.contextmanager
 def capturestderr():
-    """Replace utils.procutil.stderr with a pycompat.bytesio instance
+    """Replace utils.procutil.stderr with an io.BytesIO instance
 
     The instance is made available as the return value of __enter__.
 
@@ -63,7 +64,7 @@
 
     """
     orig = utils.procutil.stderr
-    utils.procutil.stderr = pycompat.bytesio()
+    utils.procutil.stderr = io.BytesIO()
     try:
         yield utils.procutil.stderr
     finally: