diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index f6a4ebfdc7c6..c55f77811859 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -3875,7 +3875,7 @@ def boxplot(self, x, notch=None, sym=None, vert=None,
             control is provided by the *flierprops* parameter.
 
         vert : bool, optional
-            .. deprecated:: 3.10
+            .. deprecated:: 3.11
                 Use *orientation* instead.
 
                 If this is given during the deprecation period, it overrides
@@ -4222,7 +4222,7 @@ def bxp(self, bxpstats, positions=None, widths=None, vert=None,
             The default is ``0.5*(width of the box)``, see *widths*.
 
         vert : bool, optional
-            .. deprecated:: 3.10
+            .. deprecated:: 3.11
                 Use *orientation* instead.
 
                 If this is given during the deprecation period, it overrides
@@ -4361,9 +4361,9 @@ def merge_kw_rc(subkey, explicit, zdelta=0, usemarker=True):
             vert = mpl.rcParams['boxplot.vertical']
         else:
             _api.warn_deprecated(
-                "3.10",
+                "3.11",
                 name="vert: bool",
-                alternative="orientation: {'vertical', 'horizontal'}"
+                alternative="orientation: {'vertical', 'horizontal'}",
             )
         if vert is False:
             orientation = 'horizontal'
@@ -8642,10 +8642,10 @@ def violin(self, vpstats, positions=None, vert=None,
         # vert takes precedence.
         if vert is not None:
             _api.warn_deprecated(
-                "3.10",
+                "3.11",
                 name="vert: bool",
-                alternative="orientation: {'vertical', 'horizontal'}"
-                )
+                alternative="orientation: {'vertical', 'horizontal'}",
+            )
             orientation = 'vertical' if vert else 'horizontal'
         _api.check_in_list(['horizontal', 'vertical'], orientation=orientation)
 
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index e3a59a1751ab..62eb491aa4bb 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -9314,7 +9314,7 @@ def test_violinplot_orientation(fig_test, fig_ref):
 
     # Deprecation of `vert: bool` keyword
     with pytest.warns(mpl.MatplotlibDeprecationWarning,
-                      match='vert: bool was deprecated in Matplotlib 3.10'):
+                      match='vert: bool was deprecated in Matplotlib 3.11'):
         # Compare images between a figure that
         # uses vert and one that uses orientation.
         ax_ref = fig_ref.subplots()