Clarify use of to_parquet argument
@@ -728,6 +728,8 @@ class PandasDataFrameRoundtrip(DiskTestCase):
pq_uri = str(uri.joinpath(f"{name}.pq"))
df.to_parquet(pq_uri,
+ # this is required to losslessly serialize timestamps
+ # until Parquet 2.0 is default.
use_deprecated_int96_timestamps=True,
**pq_args)
