diff --git a/pyproject.toml b/pyproject.toml
index b4783b5be3..18b3a37979 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -319,6 +319,8 @@ extend-select = [
     "PERF", # Perflint
     "PIE",  # flake8-pie
     "PGH",  # pygrep-hooks
+    "PLE",  # Pylint Error
+    "PLR",  # Pylint Refactor
     "PT",   # flake8-pytest-style
     "PYI",  # flake8-pyi
     "RET",  # flake8-return
@@ -333,6 +335,15 @@ extend-select = [
 ]
 ignore = [
     "ANN401",
+    "PLR0124",
+    "PLR0904",
+    "PLR0911",
+    "PLR0912",
+    "PLR0913",
+    "PLR0914",
+    "PLR0915",
+    "PLR0917",
+    "PLR2004",
     "PT011",  # TODO: apply this rule
     "RET505",
     "RET506",
diff --git a/src/zarr/core/array.py b/src/zarr/core/array.py
index f0cd5dd734..99c8ed9307 100644
--- a/src/zarr/core/array.py
+++ b/src/zarr/core/array.py
@@ -2119,7 +2119,7 @@ def filters(self) -> tuple[Numcodec, ...] | tuple[ArrayArrayCodec, ...]:
         return self.async_array.filters
 
     @property
-    def serializer(self) -> None | ArrayBytesCodec:
+    def serializer(self) -> ArrayBytesCodec | None:
         """
         Array-to-bytes codec to use for serializing the chunks into bytes.
         """
diff --git a/src/zarr/core/chunk_grids.py b/src/zarr/core/chunk_grids.py
index 3d7313cd5d..3129f9b9e9 100644
--- a/src/zarr/core/chunk_grids.py
+++ b/src/zarr/core/chunk_grids.py
@@ -743,7 +743,7 @@ def _auto_partition(
     given the dtype and shard shape. Otherwise, the chunks will be returned as-is.
     """
     if shard_shape is None:
-        _shards_out: None | tuple[int, ...] = None
+        _shards_out: tuple[int, ...] | None = None
         if chunk_shape == "auto":
             _chunks_out = _guess_chunks(array_shape, item_size)
         else:
diff --git a/src/zarr/core/codec_pipeline.py b/src/zarr/core/codec_pipeline.py
index 4cecc3a6d1..21381594ae 100644
--- a/src/zarr/core/codec_pipeline.py
+++ b/src/zarr/core/codec_pipeline.py
@@ -529,13 +529,12 @@ async def _read_key(
             ):
                 if chunk_array is None:
                     chunk_array_batch.append(None)  # type: ignore[unreachable]
+                elif not chunk_spec.config.write_empty_chunks and chunk_array.all_equal(
+                    fill_value_or_default(chunk_spec)
+                ):
+                    chunk_array_batch.append(None)
                 else:
-                    if not chunk_spec.config.write_empty_chunks and chunk_array.all_equal(
-                        fill_value_or_default(chunk_spec)
-                    ):
-                        chunk_array_batch.append(None)
-                    else:
-                        chunk_array_batch.append(chunk_array)
+                    chunk_array_batch.append(chunk_array)
 
             chunk_bytes_batch = await self.encode_batch(
                 [
diff --git a/src/zarr/core/group.py b/src/zarr/core/group.py
index b810041e7b..909f2e4f42 100644
--- a/src/zarr/core/group.py
+++ b/src/zarr/core/group.py
@@ -3450,7 +3450,7 @@ def _parse_hierarchy_dict(
     # but not if an empty dict was provided, because any empty hierarchy has no nodes
     if len(data_normed_keys) > 0 and "" not in data_normed_keys:
         z_format = next(iter(data_normed_keys.values())).zarr_format
-        data_normed_keys = data_normed_keys | {"": ImplicitGroupMarker(zarr_format=z_format)}
+        data_normed_keys |= {"": ImplicitGroupMarker(zarr_format=z_format)}
 
     out: dict[str, GroupMetadata | ArrayV2Metadata | ArrayV3Metadata] = {**data_normed_keys}
 
diff --git a/src/zarr/testing/stateful.py b/src/zarr/testing/stateful.py
index d6c43f4ecc..3adb272132 100644
--- a/src/zarr/testing/stateful.py
+++ b/src/zarr/testing/stateful.py
@@ -308,8 +308,8 @@ def delete_dir(self, data: DataObject) -> None:
         for node in self.all_groups | self.all_arrays:
             if node.startswith(path):
                 matches.add(node)
-        self.all_groups = self.all_groups - matches
-        self.all_arrays = self.all_arrays - matches
+        self.all_groups -= matches
+        self.all_arrays -= matches
 
     # @precondition(lambda self: bool(self.all_groups))
     # @precondition(lambda self: bool(self.all_arrays))
diff --git a/src/zarr/testing/strategies.py b/src/zarr/testing/strategies.py
index e382235e0e..aacfbd8cd6 100644
--- a/src/zarr/testing/strategies.py
+++ b/src/zarr/testing/strategies.py
@@ -124,7 +124,7 @@ def clear_store(x: Store) -> Store:
 
 
 @st.composite
-def dimension_names(draw: st.DrawFn, *, ndim: int | None = None) -> list[None | str] | None:
+def dimension_names(draw: st.DrawFn, *, ndim: int | None = None) -> list[str | None] | None:
     simple_text = st.text(zarr_key_chars, min_size=0)
     return draw(st.none() | st.lists(st.none() | simple_text, min_size=ndim, max_size=ndim))  # type: ignore[arg-type]