diff --git a/kitty_tests/fonts.py b/kitty_tests/fonts.py
index 34210fe68..7c0bd5d8a 100644
--- a/kitty_tests/fonts.py
+++ b/kitty_tests/fonts.py
@@ -138,3 +138,7 @@ class Rendering(BaseTest):
         self.ae(coalesce_symbol_maps(q), {(1, 4): 'a', (5, 5): 'b'})
         q = {(1, 4): 'a', (2, 5): 'a'}
         self.ae(coalesce_symbol_maps(q), {(1, 5): 'a'})
+        q = {(1, 4): 'a', (4, 5): 'b'}
+        self.ae(coalesce_symbol_maps(q), {(1, 3): 'a', (4, 5): 'b'})
+        q = {(4, 5): 'b', (1, 4): 'a'}
+        self.ae(coalesce_symbol_maps(q), {(1, 4): 'a', (5, 5): 'b'})