diff --git a/xarray/backends/zarr.py b/xarray/backends/zarr.py
index 4723b0ad48..975b1235e6 100644
--- a/xarray/backends/zarr.py
+++ b/xarray/backends/zarr.py
@@ -43,7 +43,6 @@
     from xarray.core.datatree import DataTree
 
 
-
 @functools.lru_cache
 def _zarr_v3() -> bool:
     try:
@@ -89,8 +88,10 @@ def __init__(self, zarr_array):
         self.shape = self._array.shape
 
         # preserve vlen string object dtype (GH 7328)
-        if not _zarr_v3() and self._array.filters is not None and any(
-            [filt.codec_id == "vlen-utf8" for filt in self._array.filters]
+        if (
+            not _zarr_v3()
+            and self._array.filters is not None
+            and any([filt.codec_id == "vlen-utf8" for filt in self._array.filters])
         ):
             dtype = coding.strings.create_vlen_dtype(str)
         else:
@@ -633,17 +634,23 @@ def open_store_variable(self, name, zarr_array=None):
         }
 
         if _zarr_v3() and zarr_array.metadata.zarr_format == 3:
-            encoding["codec_pipeline"] = [x.to_dict() for x in zarr_array.metadata.codecs]
+            encoding["codec_pipeline"] = [
+                x.to_dict() for x in zarr_array.metadata.codecs
+            ]
         elif _zarr_v3():
-            encoding.update({
-                "compressor": zarr_array.metadata.compressor,
-                "filters": zarr_array.metadata.filters,
-            })
+            encoding.update(
+                {
+                    "compressor": zarr_array.metadata.compressor,
+                    "filters": zarr_array.metadata.filters,
+                }
+            )
         else:
-            encoding.update({
-                "compressor": zarr_array.compressor,
-                "filters": zarr_array.filters,
-            })
+            encoding.update(
+                {
+                    "compressor": zarr_array.compressor,
+                    "filters": zarr_array.filters,
+                }
+            )
 
         # _FillValue needs to be in attributes, not encoding, so it will get
         # picked up by decode_cf
diff --git a/xarray/tests/test_backends.py b/xarray/tests/test_backends.py
index 91ee357d6a..35a573b451 100644
--- a/xarray/tests/test_backends.py
+++ b/xarray/tests/test_backends.py
@@ -2255,7 +2255,9 @@ def test_roundtrip_consolidated(self, consolidated) -> None:
     def test_read_non_consolidated_warning(self) -> None:
         expected = create_test_data()
         with self.create_zarr_target() as store:
-            self.save(expected, store_target=store, consolidated=False, **self.version_kwargs)
+            self.save(
+                expected, store_target=store, consolidated=False, **self.version_kwargs
+            )
             with pytest.warns(
                 RuntimeWarning,
                 match="Failed to open Zarr store with consolidated",
@@ -3044,7 +3046,12 @@ def test_encoding_chunksizes(self) -> None:
         # see also test_encoding_chunksizes_unlimited
         nx, ny, nt = 4, 4, 5
         original = xr.Dataset(
-            {}, coords={"x": np.arange(nx) + 1 , "y": np.arange(ny) + 1, "t": np.arange(nt) + 1}
+            {},
+            coords={
+                "x": np.arange(nx) + 1,
+                "y": np.arange(ny) + 1,
+                "t": np.arange(nt) + 1,
+            },
         )
         original["v"] = xr.Variable(("x", "y", "t"), np.zeros((nx, ny, nt)))
         original = original.chunk({"t": 1, "x": 2, "y": 2})
@@ -3304,6 +3311,7 @@ class TestZarrDictStore(ZarrBase):
     def create_zarr_target(self):
         if have_zarr_v3:
             import zarr.store
+
             yield zarr.store.MemoryStore({}, mode="w")
         else:
             yield {}