diff --git a/pkg_resources/__init__.py b/pkg_resources/__init__.py
index 87cfa75218..68feeb0593 100644
--- a/pkg_resources/__init__.py
+++ b/pkg_resources/__init__.py
@@ -873,9 +873,7 @@ def resolve(
 
         # Mapping of requirement to set of distributions that required it;
         # useful for reporting info about conflicts.
-        required_by: collections.defaultdict[Requirement, set[str]] = (
-            collections.defaultdict(set)
-        )
+        required_by = collections.defaultdict[Requirement, set[str]](set)
 
         while requirements:
             # process dependencies breadth-first
diff --git a/setuptools/command/_requirestxt.py b/setuptools/command/_requirestxt.py
index 171f41b87e..9029b12514 100644
--- a/setuptools/command/_requirestxt.py
+++ b/setuptools/command/_requirestxt.py
@@ -38,13 +38,13 @@ def _prepare(
 
 def _convert_extras_requirements(
     extras_require: Mapping[str, _StrOrIter],
-) -> Mapping[str, _Ordered[Requirement]]:
+) -> defaultdict[str, _Ordered[Requirement]]:
     """
     Convert requirements in `extras_require` of the form
     `"extra": ["barbazquux; {marker}"]` to
     `"extra:{marker}": ["barbazquux"]`.
     """
-    output: Mapping[str, _Ordered[Requirement]] = defaultdict(dict)
+    output = defaultdict[str, _Ordered[Requirement]](dict)
     for section, v in extras_require.items():
         # Do not strip empty sections.
         output[section]
diff --git a/setuptools/command/bdist_wheel.py b/setuptools/command/bdist_wheel.py
index 994b4b4167..d9e1eb974f 100644
--- a/setuptools/command/bdist_wheel.py
+++ b/setuptools/command/bdist_wheel.py
@@ -498,7 +498,7 @@ def license_paths(self) -> Iterable[str]:
             # Setuptools has resolved any patterns to actual file names
             return self.distribution.metadata.license_files or ()
 
-        files: set[str] = set()
+        files = set[str]()
         metadata = self.distribution.get_option_dict("metadata")
         if setuptools_major_version >= 42:
             # Setuptools recognizes the license_files option but does not do globbing
diff --git a/setuptools/command/editable_wheel.py b/setuptools/command/editable_wheel.py
index 6d23d11fad..b03e677757 100644
--- a/setuptools/command/editable_wheel.py
+++ b/setuptools/command/editable_wheel.py
@@ -506,7 +506,7 @@ def template_vars(self) -> tuple[str, str, dict[str, str], dict[str, list[str]]]
         package_dir = self.dist.package_dir or {}
         roots = _find_package_roots(top_level, package_dir, src_root)
 
-        namespaces_: dict[str, list[str]] = dict(
+        namespaces_ = dict(
             chain(
                 _find_namespaces(self.dist.packages or [], roots),
                 ((ns, []) for ns in _find_virtual_namespaces(roots)),
diff --git a/setuptools/config/pyprojecttoml.py b/setuptools/config/pyprojecttoml.py
index 15b0baa18e..fd6c5968c8 100644
--- a/setuptools/config/pyprojecttoml.py
+++ b/setuptools/config/pyprojecttoml.py
@@ -185,7 +185,7 @@ def __init__(
         self.dynamic_cfg = self.setuptools_cfg.get("dynamic", {})
         self.ignore_option_errors = ignore_option_errors
         self._dist = dist
-        self._referenced_files: set[str] = set()
+        self._referenced_files = set[str]()
 
     def _ensure_dist(self) -> Distribution:
         from setuptools.dist import Distribution
diff --git a/setuptools/config/setupcfg.py b/setuptools/config/setupcfg.py
index f2eb833b22..4615815b6b 100644
--- a/setuptools/config/setupcfg.py
+++ b/setuptools/config/setupcfg.py
@@ -253,7 +253,7 @@ def __init__(
         self.sections = dict(self._section_options(options))
         self.set_options: list[str] = []
         self.ensure_discovered = ensure_discovered
-        self._referenced_files: set[str] = set()
+        self._referenced_files = set[str]()
         """After parsing configurations, this property will enumerate
         all files referenced by the "file:" directive. Private API for setuptools only.
         """
diff --git a/setuptools/dist.py b/setuptools/dist.py
index ba45504aa8..f878b2fa45 100644
--- a/setuptools/dist.py
+++ b/setuptools/dist.py
@@ -320,7 +320,7 @@ def __init__(self, attrs: MutableMapping[str, Any] | None = None) -> None:
         # Private API (setuptools-use only, not restricted to Distribution)
         # Stores files that are referenced by the configuration and need to be in the
         # sdist (e.g. `version = file: VERSION.txt`)
-        self._referenced_files: set[str] = set()
+        self._referenced_files = set[str]()
 
         self.set_defaults = ConfigDiscovery(self)
 
@@ -399,7 +399,7 @@ def _normalize_requires(self):
     def _finalize_license_files(self) -> None:
         """Compute names of all license files which should be included."""
         license_files: list[str] | None = self.metadata.license_files
-        patterns: list[str] = license_files if license_files else []
+        patterns = license_files or []
 
         license_file: str | None = self.metadata.license_file
         if license_file and license_file not in patterns: