diff --git a/tests/conftest.py b/tests/conftest.py
index a0111acde2..d0a0c3d4a3 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -7,10 +7,12 @@
 from textwrap import dedent
 from typing import TYPE_CHECKING, TypedDict, cast
 
+import anndata as ad
 import pytest
+from packaging.version import Version
 
 # just import for the IMPORTED check
-import scanpy as _sc  # noqa: F401
+from scanpy._compat import pkg_version
 
 if TYPE_CHECKING:  # So editors understand that we’re using those fixtures
     import os
@@ -155,3 +157,10 @@ def plt():
 def exit_stack() -> Generator[ExitStack]:
     with ExitStack() as stack:
         yield stack
+
+
+@pytest.fixture(autouse=True)
+def anndata_settings():
+    if pkg_version("anndata") >= Version("0.12"):
+        ad.settings.auto_shard_zarr_v3 = True
+        ad.settings.zarr_write_format = 3