pandas 1.5 compat

anndata/tests/test_io_elementwise.py

@@ -11,6 +11,7 @@
 import pandas as pd
 import pytest
 import zarr
+from packaging.version import Version
 from scipy import sparse
 
 import anndata as ad
@@ -337,6 +338,8 @@ def test_dataframe_column_uniqueness(store):
 
 @pytest.mark.parametrize("copy_on_write", [True, False])
 def test_io_pd_cow(store, copy_on_write):
+    if Version(pd.__version__) < Version("2"):
+        pytest.xfail("copy_on_write option is not available in pandas < 2")
     # https://github.com/zarr-developers/numcodecs/issues/514
     with pd.option_context("mode.copy_on_write", copy_on_write):
         orig = gen_adata((3, 2))