diff --git a/tests/plot_sync/test_receiver.py b/tests/plot_sync/test_receiver.py
index 57f7d2d3bd..1eda3c17b1 100644
--- a/tests/plot_sync/test_receiver.py
+++ b/tests/plot_sync/test_receiver.py
@@ -218,6 +218,7 @@ async def test_reset() -> None:
     receiver._last_sync = dataclasses.replace(receiver._current_sync)
     receiver._invalid = ["1"]
     receiver._keys_missing = ["1"]
+    receiver._duplicates = ["1"]
 
     receiver._last_sync.sync_id = uint64(1)
     # Call `reset` and make sure all expected values are set back to their defaults.
@@ -237,6 +238,7 @@ async def test_to_dict(counts_only: bool) -> None:
     assert get_list_or_len(plot_sync_dict_1["plots"], not counts_only) == 10
     assert get_list_or_len(plot_sync_dict_1["failed_to_open_filenames"], not counts_only) == 0
     assert get_list_or_len(plot_sync_dict_1["no_key_filenames"], not counts_only) == 0
+    assert get_list_or_len(plot_sync_dict_1["duplicates"], not counts_only) == 0
     assert plot_sync_dict_1["total_plot_size"] == sum(plot.file_size for plot in receiver.plots().values())
     assert plot_sync_dict_1["syncing"] is None
     assert plot_sync_dict_1["last_sync_time"] is None