diff --git a/rplugin/python3/gkeep/views/notelist.py b/rplugin/python3/gkeep/views/notelist.py
index 2e5f08f..4ae1773 100644
--- a/rplugin/python3/gkeep/views/notelist.py
+++ b/rplugin/python3/gkeep/views/notelist.py
@@ -21,6 +21,7 @@
 )
 from gkeepapi.node import ColorValue, Note
 from pynvim.api import Buffer, Nvim, Window
+from typing_extensions import assert_never
 
 logger = logging.getLogger(__name__)
 
@@ -277,8 +278,7 @@ def _new_note(self, note_type: NoteFormat, title: str) -> None:
         elif type == NoteEnum.LIST:
             note = self._api.createList(title, [("", False)])
         else:
-            util.echoerr(self._vim, f"Unknown note type '{type}'")
-            return
+            assert_never(type)
         if not self.query.pinned(note.pinned):
             note.pinned = not note.pinned
         if self.query.labels: