diff --git a/kitty_tests/layout.py b/kitty_tests/layout.py
index 8e47fdf9b..34d187434 100644
--- a/kitty_tests/layout.py
+++ b/kitty_tests/layout.py
@@ -5,6 +5,7 @@
 from kitty.config import defaults
 from kitty.fast_data_types import pt_to_px
 from kitty.layout import Horizontal, Stack, Tall, Grid, idx_for_id
+from kitty.constants import WindowGeometry
 
 from . import BaseTest
 
@@ -16,6 +17,7 @@ class Window:
         self.overlay_for = overlay_for
         self.overlay_window_id = overlay_window_id
         self.is_visible_in_layout = True
+        self.geometry = WindowGeometry(0, 0, 0, 0, 0, 0)
 
     def set_visible_in_layout(self, idx, val):
         self.is_visible_in_layout = bool(val)