diff --git a/bin/update_pythons.py b/bin/update_pythons.py
index 8649f765e..e57a71735 100755
--- a/bin/update_pythons.py
+++ b/bin/update_pythons.py
@@ -5,7 +5,6 @@
 import copy
 import difflib
 import logging
-import sys
 from collections.abc import Mapping, MutableMapping
 from pathlib import Path
 from typing import Any, Union
@@ -13,17 +12,12 @@
 import click
 import requests
 import rich
-
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
-
 from packaging.specifiers import Specifier
 from packaging.version import Version
 from rich.logging import RichHandler
 from rich.syntax import Syntax
 
+from cibuildwheel._compat import tomllib
 from cibuildwheel._compat.typing import Final, Literal, TypedDict
 from cibuildwheel.extra import dump_python_configurations
 
diff --git a/bin/update_virtualenv.py b/bin/update_virtualenv.py
index 7e22d3834..a00724063 100755
--- a/bin/update_virtualenv.py
+++ b/bin/update_virtualenv.py
@@ -5,22 +5,16 @@
 import difflib
 import logging
 import subprocess
-import sys
 from dataclasses import dataclass
 from pathlib import Path
 
 import click
 import rich
-
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
-
 from packaging.version import InvalidVersion, Version
 from rich.logging import RichHandler
 from rich.syntax import Syntax
 
+from cibuildwheel._compat import tomllib
 from cibuildwheel._compat.typing import Final
 
 log = logging.getLogger("cibw")
diff --git a/cibuildwheel/_compat/tomllib.py b/cibuildwheel/_compat/tomllib.py
new file mode 100644
index 000000000..f3b30fe65
--- /dev/null
+++ b/cibuildwheel/_compat/tomllib.py
@@ -0,0 +1,10 @@
+from __future__ import annotations
+
+import sys
+
+if sys.version_info >= (3, 11):
+    from tomllib import load  # noqa: TID251
+else:
+    from tomli import load  # noqa: TID251
+
+__all__ = ("load",)
diff --git a/cibuildwheel/options.py b/cibuildwheel/options.py
index d4c88222b..736f13a73 100644
--- a/cibuildwheel/options.py
+++ b/cibuildwheel/options.py
@@ -15,13 +15,9 @@
 from pathlib import Path
 from typing import Any, Dict, List, Union
 
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
-
 from packaging.specifiers import SpecifierSet
 
+from ._compat import tomllib
 from ._compat.typing import Literal, NotRequired, TypedDict
 from .architecture import Architecture
 from .environment import EnvironmentParseError, ParsedEnvironment, parse_environment
diff --git a/cibuildwheel/projectfiles.py b/cibuildwheel/projectfiles.py
index 0b87415b6..95dc150d8 100644
--- a/cibuildwheel/projectfiles.py
+++ b/cibuildwheel/projectfiles.py
@@ -7,10 +7,7 @@
 from pathlib import Path
 from typing import Any
 
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
+from ._compat import tomllib
 
 if sys.version_info < (3, 8):
     Constant = ast.Str
diff --git a/cibuildwheel/util.py b/cibuildwheel/util.py
index 00771eb5b..8b5f9f620 100644
--- a/cibuildwheel/util.py
+++ b/cibuildwheel/util.py
@@ -23,12 +23,6 @@
 
 import bracex
 import certifi
-
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
-
 from filelock import FileLock
 from packaging.requirements import InvalidRequirement, Requirement
 from packaging.specifiers import SpecifierSet
@@ -36,6 +30,7 @@
 from packaging.version import Version
 from platformdirs import user_cache_path
 
+from ._compat import tomllib
 from ._compat.functools import cached_property
 from ._compat.typing import Final, Literal
 from .typing import PathOrStr, PlatformName
diff --git a/pyproject.toml b/pyproject.toml
index 29e9c2312..90420fcaf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -164,7 +164,9 @@ flake8-unused-arguments.ignore-variadic-names = true
 "typing.OrderedDict".msg = "Use cibuildwheel._compat.typing.OrderedDict instead."
 "typing.TypedDict".msg = "Use cibuildwheel._compat.typing.TypedDict instead."
 "typing.NotRequired".msg = "Use cibuildwheel._compat.typing.NotRequired instead."
-"typing.assert_never".msg = "Use cibuildwhee._compat.typing.assert_never instead."
+"typing.assert_never".msg = "Use cibuildwheel._compat.typing.assert_never instead."
+"tomllib".msg = "Use cibuildwheel._compat.tomllib instead."
+"tomli".msg = "Use cibuildwheel._compat.tomllib instead."
 
 [tool.ruff.per-file-ignores]
 "unit_test/*" = ["PLC1901"]
diff --git a/unit_test/build_ids_test.py b/unit_test/build_ids_test.py
index 0f62ba408..a42af93de 100644
--- a/unit_test/build_ids_test.py
+++ b/unit_test/build_ids_test.py
@@ -1,14 +1,8 @@
 from __future__ import annotations
 
-import sys
-
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
-
 from packaging.version import Version
 
+from cibuildwheel._compat import tomllib
 from cibuildwheel.extra import Printable, dump_python_configurations
 from cibuildwheel.util import resources_dir
 
diff --git a/unit_test/main_tests/main_options_test.py b/unit_test/main_tests/main_options_test.py
index 6cda8967b..8d2010ee3 100644
--- a/unit_test/main_tests/main_options_test.py
+++ b/unit_test/main_tests/main_options_test.py
@@ -6,12 +6,8 @@
 
 import pytest
 
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
-
 from cibuildwheel.__main__ import main
+from cibuildwheel._compat import tomllib
 from cibuildwheel.environment import ParsedEnvironment
 from cibuildwheel.options import BuildOptions, _get_pinned_container_images
 from cibuildwheel.util import BuildSelector, resources_dir, split_config_settings