diff --git a/quotequail/_html.py b/quotequail/_html.py
index f40a595..64f3a0f 100644
--- a/quotequail/_html.py
+++ b/quotequail/_html.py
@@ -256,8 +256,6 @@ def tree_token_generator(el, indentation_level=0):
     if not isinstance(el.tag, string_class):
         return
 
-    tag_name = el.tag.lower()
-
     is_indentation = is_indentation_element(el)
 
     if is_indentation: