diff --git a/gspread/worksheet.py b/gspread/worksheet.py
index 7c0d98c2..2bff0091 100644
--- a/gspread/worksheet.py
+++ b/gspread/worksheet.py
@@ -2655,11 +2655,7 @@ def get_notes(
         """
         params: ParamsType = {
             "fields": "sheets.data.rowData.values.note",
-            "ranges": (
-                self.title
-                if grid_range is None
-                else absolute_range_name(self.title, grid_range)
-            ),
+            "ranges": absolute_range_name(self.title, grid_range),
         }
 
         res = self.client.spreadsheets_get(self.spreadsheet_id, params)