Fix Zarr tests

Author: dcherian

xarray/tests/test_backends.py

@@ -2320,6 +2320,9 @@ def roundtrip(
             with self.open(store_target, **open_kwargs) as ds:
                 yield ds
 
+    def test_roundtrip_bytes_with_fill_value(self):
+        pytest.xfail("Broken by Zarr 3.0.7")
+
     @pytest.mark.parametrize("consolidated", [False, True, None])
     def test_roundtrip_consolidated(self, consolidated) -> None:
         expected = create_test_data()
@@ -3563,7 +3566,7 @@ def test_region_write(self) -> None:
                     "iter": 1,
                     "contains": 16,
                     "setitem": 9,
-                    "getitem": 13,
+                    "getitem": 15,
                     "listdir": 0,
                     "list_prefix": 5,
                 }