Update [testenv] section in tox.ini

Author: domdfcoding

repo_helper.yml

@@ -60,6 +60,3 @@ extra_sphinx_extensions:
 sphinx_conf_epilogue:
  - "	from sphinx_toolbox.latex import replace_unknown_unicode"
  - '	app.connect("build-finished", replace_unknown_unicode)'
-
-tox_unmanaged:
- - testenv

tox.ini

@@ -2,6 +2,7 @@
 # You may add new sections, but any changes made to the following sections will be lost:
 #     * tox
 #     * envlists
+#     * testenv
 #     * testenv:py312-dev
 #     * testenv:docs
 #     * testenv:build
@@ -42,6 +43,16 @@ test = py36, py37, py38, py39, py310, py311-dev, pypy36, pypy37, pypy38
 qa = mypy, lint
 cov = py38, coverage
 
+[testenv]
+setenv =
+    PYTHONDEVMODE=1
+    PIP_DISABLE_PIP_VERSION_CHECK=1
+    SETUPTOOLS_USE_DISTUTILS=stdlib
+deps = -r{toxinidir}/tests/requirements.txt
+commands =
+    python --version
+    python -m pytest --cov=seed_intersphinx_mapping -r aR tests/ {posargs}
+
 [testenv:docs]
 setenv = SHOW_TODOS = 1
 passenv = SPHINX_BUILDER
@@ -184,13 +195,3 @@ package = seed_intersphinx_mapping
 [pytest]
 addopts = --color yes --durations 25
 timeout = 300
-
-[testenv]
-setenv =
-    PYTHONDEVMODE=1
-    PIP_DISABLE_PIP_VERSION_CHECK=1
-    PIP_EXTRA_INDEX_URL = https://domdfcoding.github.io/3.11-wheels/wheels/
-deps = -r{toxinidir}/tests/requirements.txt
-commands =
-    python --version
-    python -m pytest --cov=seed_intersphinx_mapping -r aR tests/ {posargs}