diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
index 7c9185458303..cad1b3ef3ca9 100644
--- a/lib/matplotlib/axes/_base.py
+++ b/lib/matplotlib/axes/_base.py
@@ -2601,9 +2601,9 @@ def autoscale_view(self, tight=None, scalex=True, scaley=True):
                     for ax in self._shared_y_axes.get_siblings(self)
                     if hasattr(ax, "lines")
                     for artist in ax.get_children()]))
-        if self.get_xscale().lower() == 'log':
+        if self.get_xscale() == 'log':
             x_stickies = x_stickies[x_stickies > 0]
-        if self.get_yscale().lower() == 'log':
+        if self.get_yscale() == 'log':
             y_stickies = y_stickies[y_stickies > 0]
 
         def handle_single_axis(scale, autoscaleon, shared_axes, interval,
diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
index 1cf574756955..15fa8cd5b863 100644
--- a/lib/matplotlib/axis.py
+++ b/lib/matplotlib/axis.py
@@ -98,11 +98,10 @@ def __init__(self, axes, loc, label=None,
         self.set_figure(axes.figure)
         self.axes = axes
 
-        name = self.__name__.lower()
-
         self._loc = loc
         self._major = major
 
+        name = self.__name__
         major_minor = "major" if major else "minor"
 
         if size is None:
@@ -448,7 +447,7 @@ def _get_text2_transform(self):
     def apply_tickdir(self, tickdir):
         """Set tick direction. Valid values are 'in', 'out', 'inout'."""
         if tickdir is None:
-            tickdir = mpl.rcParams['%s.direction' % self.__name__.lower()]
+            tickdir = mpl.rcParams[f'{self.__name__}.direction']
         _api.check_in_list(['in', 'out', 'inout'], tickdir=tickdir)
         self._tickdir = tickdir
 
@@ -520,7 +519,7 @@ def _get_text2_transform(self):
 
     def apply_tickdir(self, tickdir):
         if tickdir is None:
-            tickdir = mpl.rcParams['%s.direction' % self.__name__.lower()]
+            tickdir = mpl.rcParams[f'{self.__name__}.direction']
         self._tickdir = tickdir
 
         if self._tickdir == 'in':
diff --git a/lib/matplotlib/blocking_input.py b/lib/matplotlib/blocking_input.py
index 561fb4520136..fde7f30c5f38 100644
--- a/lib/matplotlib/blocking_input.py
+++ b/lib/matplotlib/blocking_input.py
@@ -149,10 +149,9 @@ def key_event(self):
         if event.key is None:
             # At least in OSX gtk backend some keys return None.
             return
-        key = event.key.lower()
-        if key in ['backspace', 'delete']:
+        if event.key in ['backspace', 'delete']:
             self.mouse_event_pop(event)
-        elif key in ['escape', 'enter']:
+        elif event.key in ['escape', 'enter']:
             self.mouse_event_stop(event)
         else:
             self.mouse_event_add(event)