Don't run test_arbitrary_zarr_store on tensorstore

Author: tomwhite

cubed/tests/test_store.py

@@ -5,13 +5,14 @@
 
 import cubed
 import cubed.array_api as xp
+from cubed.storage.backend import backend_storage_name
 
 ZARR_PYTHON_V2 = zarr.__version__[0] == "2"
 
 
 @pytest.mark.skipif(
-    ZARR_PYTHON_V2,
-    reason="setting an arbitrary Zarr store is not supported for Zarr Python v2",
+    ZARR_PYTHON_V2 or backend_storage_name() == "tensorstore",
+    reason="setting an arbitrary Zarr store is not supported for Zarr Python v2, or tensorstore",
 )
 def test_arbitrary_zarr_store():
     store = zarr.storage.MemoryStore()