diff --git a/kitty_tests/graphics.py b/kitty_tests/graphics.py
index 335706c06..8aa3970a4 100644
--- a/kitty_tests/graphics.py
+++ b/kitty_tests/graphics.py
@@ -267,6 +267,10 @@ class TestGraphics(BaseTest):
         check_data()
         dc.clear()
 
+        st = time.monotonic()
+        while dc.size_on_disk() and time.monotonic() - st < 20:
+            time.sleep(0.01)
+        self.assertEqual(dc.size_on_disk(), 0)
         for frame in range(32):
             add(f'1:{frame}', f'{frame:02d}' * 8)
         dc.wait_for_write()