diff --git a/kitty/actions.py b/kitty/actions.py
index b04f2648a..ab3f9acbd 100644
--- a/kitty/actions.py
+++ b/kitty/actions.py
@@ -2,7 +2,7 @@
 # License: GPLv3 Copyright: 2021, Kovid Goyal <kovid at kovidgoyal.net>
 
 import inspect
-from typing import NamedTuple, cast
+from typing import NamedTuple
 
 from .boss import Boss
 from .tabs import Tab
@@ -50,7 +50,7 @@ def get_all_actions() -> dict[ActionGroup, list[Action]]:
         short_help = first
         long_help = '\n'.join(lines).strip()
         assert spec.group in groups
-        return Action(getattr(x, '__name__'), cast(ActionGroup, spec.group), short_help, long_help)
+        return Action(getattr(x, '__name__'), spec.group, short_help, long_help)
 
     seen = set()
     for cls in (Window, Tab, Boss):
diff --git a/kitty/search_query_parser.py b/kitty/search_query_parser.py
index 4c551d11b..51a6f7cc7 100644
--- a/kitty/search_query_parser.py
+++ b/kitty/search_query_parser.py
@@ -93,7 +93,8 @@ class NotNode(SearchTreeNode):
         self.rhs = rhs
 
     def __call__(self, candidates: set[T], get_matches: GetMatches[T]) -> set[T]:
-        return candidates.difference(self.rhs(candidates, get_matches))
+        rhs_result: set[T] = self.rhs(candidates, get_matches)
+        return candidates.difference(rhs_result)
 
     def iter_token_nodes(self) -> Iterator['TokenNode']:
         yield from self.rhs.iter_token_nodes()