diff --git a/AUTHORS b/AUTHORS
index cfbcf432b..b59ebc2a2 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -150,6 +150,7 @@ Karl O. Pinc
 Katarzyna Jachim
 Katarzyna Król
 Katerina Koukiou
+Keri Volans
 Kevin Cox
 Kevin J. Foley
 Kodi B. Arfer
diff --git a/src/_pytest/pytester.py b/src/_pytest/pytester.py
index 9fcda8f0b..051ea3fc7 100644
--- a/src/_pytest/pytester.py
+++ b/src/_pytest/pytester.py
@@ -35,6 +35,7 @@ from _pytest.main import Session
 from _pytest.monkeypatch import MonkeyPatch
 from _pytest.nodes import Collector
 from _pytest.nodes import Item
+from _pytest.pathlib import make_numbered_dir
 from _pytest.pathlib import Path
 from _pytest.python import Module
 from _pytest.reports import TestReport
@@ -1256,9 +1257,7 @@ class Testdir:
         Returns a :py:class:`RunResult`.
         """
         __tracebackhide__ = True
-        p = py.path.local.make_numbered_dir(
-            prefix="runpytest-", keep=None, rootdir=self.tmpdir
-        )
+        p = make_numbered_dir(root=Path(self.tmpdir), prefix="runpytest-")
         args = ("--basetemp=%s" % p,) + args
         plugins = [x for x in self.plugins if isinstance(x, str)]
         if plugins:
diff --git a/testing/test_assertrewrite.py b/testing/test_assertrewrite.py
index 8cf492966..487a7d133 100644
--- a/testing/test_assertrewrite.py
+++ b/testing/test_assertrewrite.py
@@ -10,8 +10,6 @@ import textwrap
 import zipfile
 from functools import partial
 
-import py
-
 import _pytest._code
 import pytest
 from _pytest.assertion import util
@@ -22,6 +20,7 @@ from _pytest.assertion.rewrite import PYC_TAIL
 from _pytest.assertion.rewrite import PYTEST_TAG
 from _pytest.assertion.rewrite import rewrite_asserts
 from _pytest.config import ExitCode
+from _pytest.pathlib import make_numbered_dir
 from _pytest.pathlib import Path
 
 
@@ -822,9 +821,7 @@ def test_rewritten():
                 "hello"
                 assert test_optimized.__doc__ is None"""
         )
-        p = py.path.local.make_numbered_dir(
-            prefix="runpytest-", keep=None, rootdir=testdir.tmpdir
-        )
+        p = make_numbered_dir(root=Path(testdir.tmpdir), prefix="runpytest-")
         tmp = "--basetemp=%s" % p
         monkeypatch.setenv("PYTHONOPTIMIZE", "2")
         monkeypatch.delenv("PYTHONDONTWRITEBYTECODE", raising=False)