diff --git a/kitty_tests/fonts.py b/kitty_tests/fonts.py
index d30b7c6b3..d841f0687 100644
--- a/kitty_tests/fonts.py
+++ b/kitty_tests/fonts.py
@@ -28,7 +28,7 @@ class Rendering(BaseTest):
         self.test_ctx.__enter__()
         self.sprites, self.cell_width, self.cell_height = self.test_ctx.__enter__()
         try:
-            self.assertEqual([k[0] for k in self.sprites], [0, 1, 2, 3, 4, 5, 6, 7, 8])
+            self.assertEqual([k[0] for k in self.sprites], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
         except Exception:
             self.test_ctx.__exit__()
             del self.test_ctx