diff --git a/tests/data/df.zarr.zip b/tests/data/df.zarr.zip
index 4cf8c17..fd6be44 100644
Binary files a/tests/data/df.zarr.zip and b/tests/data/df.zarr.zip differ
diff --git a/tests/data/generate_trusted_result.py b/tests/data/generate_trusted_result.py
index 898d651..da1e59b 100644
--- a/tests/data/generate_trusted_result.py
+++ b/tests/data/generate_trusted_result.py
@@ -16,6 +16,7 @@
         test_df._write_test_data(tmp_dir)
         output_zarr = os.path.join(tmp_dir, "output.zarr")
         files = glob.glob(os.path.join(tmp_dir, "*.jp2"))
+        files.sort()
         with zipfile.ZipFile("data/df_input.zip", "w") as z:
             for file in files:
                 z.write(file, os.path.basename(file))
diff --git a/tests/test_df.py b/tests/test_df.py
index 384b2f4..163f4fd 100644
--- a/tests/test_df.py
+++ b/tests/test_df.py
@@ -21,5 +21,6 @@ def test_df(tmp_path):
         z.extractall(tmp_path)
     output_zarr = tmp_path / "output.zarr"
     files = glob.glob(os.path.join(tmp_path, "*.jp2"))
+    files.sort()
     multi_slice.convert(files, str(output_zarr))
     assert _cmp_zarr_archives(str(output_zarr), "data/df.zarr.zip")