diff --git a/stubs/setuptools/pkg_resources/__init__.pyi b/stubs/setuptools/pkg_resources/__init__.pyi
index 1e517437457a..b7b062e29cd7 100644
--- a/stubs/setuptools/pkg_resources/__init__.pyi
+++ b/stubs/setuptools/pkg_resources/__init__.pyi
@@ -58,13 +58,15 @@ class Environment:
     def __add__(self, other: Distribution | Environment) -> Environment: ...
     def __iadd__(self: Self, other: Distribution | Environment) -> Self: ...
     @overload
-    def best_match(self, req: Requirement, working_set: WorkingSet) -> Distribution: ...
+    def best_match(self, req: Requirement, working_set: WorkingSet, *, replace_conflicting: bool = ...) -> Distribution: ...
     @overload
-    def best_match(self, req: Requirement, working_set: WorkingSet, installer: Callable[[Requirement], _T] = ...) -> _T: ...
+    def best_match(
+        self, req: Requirement, working_set: WorkingSet, installer: Callable[[Requirement], _T], replace_conflicting: bool = ...
+    ) -> _T: ...
     @overload
     def obtain(self, requirement: Requirement) -> None: ...
     @overload
-    def obtain(self, requirement: Requirement, installer: Callable[[Requirement], _T] = ...) -> _T: ...
+    def obtain(self, requirement: Requirement, installer: Callable[[Requirement], _T]) -> _T: ...
     def scan(self, search_path: Sequence[str] | None = ...) -> None: ...
 
 def parse_requirements(strs: str | Iterable[str]) -> Generator[Requirement, None, None]: ...