diff --git a/docs/conf.py b/docs/conf.py
index 8a8501d1..449ac3d9 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -2,6 +2,13 @@
 
 from datetime import date, datetime
 
+from docutils.nodes import Element, Text
+from sphinx.addnodes import pending_xref
+from sphinx.application import Sphinx
+from sphinx.builders import Builder
+from sphinx.domains.python import PythonDomain
+from sphinx.environment import BuildEnvironment
+
 from filelock import __version__
 
 name, company = "filelock", "tox-dev"
@@ -30,3 +37,25 @@
     "pr": ("https://github.com/tox-dev/py-filelock/issues/%s", "PR #%s"),
     "user": ("https://github.com/%s", "@%s"),
 }
+
+
+def setup(app: Sphinx) -> None:
+    class PatchedPythonDomain(PythonDomain):
+        def resolve_xref(
+            self,
+            env: BuildEnvironment,
+            fromdocname: str,
+            builder: Builder,
+            type: str,
+            target: str,
+            node: pending_xref,
+            contnode: Element,
+        ) -> Element:
+            mapping = {"_thread._local": ("threading.local", "local")}
+            if target in mapping:
+                of_type, with_name = mapping[target]
+                target = node["reftarget"] = of_type
+                contnode.children[0] = Text(with_name, with_name)
+            return super().resolve_xref(env, fromdocname, builder, type, target, node, contnode)
+
+    app.add_domain(PatchedPythonDomain, override=True)
diff --git a/tox.ini b/tox.ini
index 0d21a506..b71c95c6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,7 +21,7 @@ wheel_build_env = .pkg
 extras =
     testing
 passenv =
-    PYTEST_*
+    PYTEST_ADDOPTS
 setenv =
     COVERAGE_FILE = {toxworkdir}{/}.coverage.{envname}
 commands =
@@ -38,8 +38,6 @@ basepython = python3.10
 skip_install = true
 deps =
     pre-commit>=3.2.1
-passenv =
-    *
 commands =
     pre-commit run --all-files --show-diff-on-failure
     python -c 'import pathlib; print("hint: run \{\} install to add checks as pre-commit hook".format(pathlib.Path(r"{envdir}") / "bin" / "pre-commit"))'
@@ -85,7 +83,7 @@ description = build documentation
 extras =
     docs
 commands =
-    sphinx-build -d "{envtmpdir}{/}doctree" docs "{toxworkdir}{/}docs_out" --color -b html {posargs}
+    sphinx-build -d "{envtmpdir}{/}doctree" docs "{toxworkdir}{/}docs_out" --color -b html -W {posargs}
     python -c 'print(r"documentation available under file://{toxworkdir}{/}docs_out{/}index.html")'
 
 [testenv:readme]
diff --git a/whitelist.txt b/whitelist.txt
index 90d6069e..54a6c420 100644
--- a/whitelist.txt
+++ b/whitelist.txt
@@ -1,13 +1,17 @@
+addnodes
 autoclass
 autodoc
 autosectionlabel
 caplog
+contnode
+docutils
 eacces
 enosys
 extlinks
 fchmod
 filelock
 filemode
+fromdocname
 fspath
 getframeinfo
 intersphinx