diff --git a/lib/matplotlib/pyplot.py b/lib/matplotlib/pyplot.py
index cf5c9b4b739f..8da666499702 100644
--- a/lib/matplotlib/pyplot.py
+++ b/lib/matplotlib/pyplot.py
@@ -50,7 +50,7 @@
import sys
import threading
import time
-from typing import TYPE_CHECKING, cast, overload
+from typing import IO, TYPE_CHECKING, cast, overload
from cycler import cycler # noqa: F401
import matplotlib
@@ -338,8 +338,8 @@ def uninstall_repl_displayhook() -> None:
# Ensure this appears in the pyplot docs.
@_copy_docstring_and_deprecators(matplotlib.set_loglevel)
-def set_loglevel(*args, **kwargs) -> None:
- return matplotlib.set_loglevel(*args, **kwargs)
+def set_loglevel(level: str) -> None:
+ return matplotlib.set_loglevel(level)
@_copy_docstring_and_deprecators(Artist.findobj)
@@ -1251,11 +1251,11 @@ def draw() -> None:
@_copy_docstring_and_deprecators(Figure.savefig)
-def savefig(*args, **kwargs) -> None:
+def savefig(fname: str | os.PathLike | IO, **kwargs) -> None:
fig = gcf()
# savefig default implementation has no return, so mypy is unhappy
# presumably this is here because subclasses can return?
- res = fig.savefig(*args, **kwargs) # type: ignore[func-returns-value]
+ res = fig.savefig(fname, **kwargs) # type: ignore[func-returns-value]
fig.canvas.draw_idle() # Need this if 'transparent=True', to reset colors.
return res
diff --git a/lib/matplotlib/tests/test_pyplot.py b/lib/matplotlib/tests/test_pyplot.py
index ab713707bace..55f7c33cb52e 100644
--- a/lib/matplotlib/tests/test_pyplot.py
+++ b/lib/matplotlib/tests/test_pyplot.py
@@ -1,4 +1,5 @@
import difflib
+import inspect
import numpy as np
import sys
@@ -484,3 +485,26 @@ def test_matshow():
# Smoke test that matshow does not ask for a new figsize on the existing figure
plt.matshow(arr, fignum=fig.number)
+
+
+def assert_same_signature(func1, func2):
+ """
+ Assert that `func1` and `func2` have the same arguments,
+ i.e. same parameter count, names and kinds.
+
+ :param func1: First function to check
+ :param func2: Second function to check
+ """
+ params1 = inspect.signature(func1).parameters
+ params2 = inspect.signature(func2).parameters
+
+ assert len(params1) == len(params2)
+ assert all([
+ params1[p].name == params2[p].name and
+ params1[p].kind == params2[p].kind
+ for p in params1
+ ])
+
+
+def test_setloglevel_signature():
+ assert_same_signature(plt.set_loglevel, mpl.set_loglevel)
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