diff --git a/doc/api/api_changes_3.3/deprecations.rst b/doc/api/api_changes_3.3/deprecations.rst
index 680f049249e3..f32aa8c0e312 100644
--- a/doc/api/api_changes_3.3/deprecations.rst
+++ b/doc/api/api_changes_3.3/deprecations.rst
@@ -423,6 +423,12 @@ or None is deprecated; set it to "horizontal" instead.  Moreover, the two
 orientations ("horizontal" and "vertical") will become case-sensitive in the
 future.
 
+`CleanupTestCase` and `cleanup` in decorators deprecated
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+The class `matplotlib.testing.decorators.CleanupTestCase` and the decorator
+`matplotlib.testing.decorators.cleanup` are not used in the code base. We have
+an automatic cleanup via an auto-used fixture instead.
+
 *minor* kwarg to `.Axis.get_ticklocs` will become keyword-only
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Passing this argument positionally is deprecated.
diff --git a/doc/badsectors.txt b/doc/badsectors.txt
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/lib/matplotlib/testing/decorators.py b/lib/matplotlib/testing/decorators.py
index f1c988370c6e..cd68f837fc72 100644
--- a/lib/matplotlib/testing/decorators.py
+++ b/lib/matplotlib/testing/decorators.py
@@ -35,58 +35,6 @@ def _cleanup_cm():
         plt.close("all")
 
 
-class CleanupTestCase(unittest.TestCase):
-    """A wrapper for unittest.TestCase that includes cleanup operations."""
-    @classmethod
-    def setUpClass(cls):
-        cls._cm = _cleanup_cm().__enter__()
-
-    @classmethod
-    def tearDownClass(cls):
-        cls._cm.__exit__(None, None, None)
-
-
-def cleanup(style=None):
-    """
-    A decorator to ensure that any global state is reset before
-    running a test.
-
-    Parameters
-    ----------
-    style : str, dict, or list, optional
-        The style(s) to apply.  Defaults to ``["classic",
-        "_classic_test_patch"]``.
-    """
-
-    # If cleanup is used without arguments, *style* will be a callable, and we
-    # pass it directly to the wrapper generator.  If cleanup if called with an
-    # argument, it is a string naming a style, and the function will be passed
-    # as an argument to what we return.  This is a confusing, but somewhat
-    # standard, pattern for writing a decorator with optional arguments.
-
-    def make_cleanup(func):
-        if inspect.isgeneratorfunction(func):
-            @functools.wraps(func)
-            def wrapped_callable(*args, **kwargs):
-                with _cleanup_cm(), matplotlib.style.context(style):
-                    yield from func(*args, **kwargs)
-        else:
-            @functools.wraps(func)
-            def wrapped_callable(*args, **kwargs):
-                with _cleanup_cm(), matplotlib.style.context(style):
-                    func(*args, **kwargs)
-
-        return wrapped_callable
-
-    if callable(style):
-        result = make_cleanup(style)
-        # Default of mpl_test_settings fixture and image_comparison too.
-        style = ["classic", "_classic_test_patch"]
-        return result
-    else:
-        return make_cleanup
-
-
 def check_freetype_version(ver):
     if ver is None:
         return True