diff --git a/markdown/extensions/admonition.py b/markdown/extensions/admonition.py
index 01c2316d..d0e97002 100644
--- a/markdown/extensions/admonition.py
+++ b/markdown/extensions/admonition.py
@@ -59,7 +59,7 @@ def __init__(self, parser: blockparser.BlockParser):
         super().__init__(parser)
 
         self.current_sibling: etree.Element | None = None
-        self.content_indent = 0
+        self.content_indention = 0
 
     def parse_content(self, parent: etree.Element, block: str) -> tuple[etree.Element | None, str, str]:
         """Get sibling admonition.
diff --git a/markdown/extensions/codehilite.py b/markdown/extensions/codehilite.py
index 352f1eaa..0114908f 100644
--- a/markdown/extensions/codehilite.py
+++ b/markdown/extensions/codehilite.py
@@ -27,7 +27,6 @@
 from typing import TYPE_CHECKING, Callable, Any
 
 if TYPE_CHECKING:  # pragma: no cover
-    from markdown import Markdown
     import xml.etree.ElementTree as etree
 
 try:  # pragma: no cover
@@ -255,7 +254,6 @@ class HiliteTreeprocessor(Treeprocessor):
     """ Highlight source code in code blocks. """
 
     config: dict[str, Any]
-    md: Markdown
 
     def code_unescape(self, text: str) -> str:
         """Unescape code."""
diff --git a/markdown/extensions/fenced_code.py b/markdown/extensions/fenced_code.py
index 40e01018..da1a9be1 100644
--- a/markdown/extensions/fenced_code.py
+++ b/markdown/extensions/fenced_code.py
@@ -159,7 +159,7 @@ def handle_attrs(self, attrs: Iterable[tuple[str, str]]) -> tuple[str, list[str]
         """ Return tuple: `(id, [list, of, classes], {configs})` """
         id = ''
         classes = []
-        configs: dict[str, Any] = {}
+        configs = {}
         for k, v in attrs:
             if k == 'id':
                 id = v
diff --git a/markdown/serializers.py b/markdown/serializers.py
index cc48710c..573b2648 100644
--- a/markdown/serializers.py
+++ b/markdown/serializers.py
@@ -48,7 +48,7 @@
 from xml.etree.ElementTree import ProcessingInstruction
 from xml.etree.ElementTree import Comment, ElementTree, Element, QName, HTML_EMPTY
 import re
-from typing import Callable, Iterable, Literal, NoReturn
+from typing import Callable, Literal, NoReturn
 
 __all__ = ['to_html_string', 'to_xhtml_string']
 
@@ -136,7 +136,7 @@ def _serialize_html(write: Callable[[str], None], elem: Element, format: Literal
             else:
                 raise ValueError('QName objects must define a tag.')
         write("<" + tag)
-        items: Iterable[tuple[str, str]] = elem.items()
+        items = elem.items()
         if items:
             items = sorted(items)  # lexical order
             for k, v in items: