diff --git a/pyproject.toml b/pyproject.toml
index 38eeacaf42..cd80eec75b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -134,12 +134,6 @@ type = [
 	# until types-setuptools is removed from typeshed.
 	# For help with static-typing issues, or mypy update, ping @Avasam 
 	"mypy==1.11.*",
-	# Conditionally imported vendored dependencies.
-	# They're not needed at runtime for Python version outside the [core] extra,
-	# but they're still needed for type-checking since we import them directly
-	"tomli",
-	"importlib_resources",
-	"importlib_metadata",
 ]
 
 
diff --git a/setuptools/tests/integration/test_pip_install_sdist.py b/setuptools/tests/integration/test_pip_install_sdist.py
index 2d59337aff..cdd4e4caa8 100644
--- a/setuptools/tests/integration/test_pip_install_sdist.py
+++ b/setuptools/tests/integration/test_pip_install_sdist.py
@@ -202,13 +202,15 @@ def build_deps(package, sdist_file):
     "Manually" install them, since pip will not install build
     deps with `--no-build-isolation`.
     """
-    import tomli as toml
-
     # delay importing, since pytest discovery phase may hit this file from a
     # testenv without tomli
+    if sys.version_info >= (3, 11):
+        import tomllib
+    else:  # pragma: no cover
+        import tomli as tomllib
 
     archive = Archive(sdist_file)
-    info = toml.loads(_read_pyproject(archive))
+    info = tomllib.loads(_read_pyproject(archive))
     deps = info.get("build-system", {}).get("requires", [])
     deps += EXTRA_BUILD_DEPS.get(package, [])
     # Remove setuptools from requirements (and deduplicate)