diff --git a/src/zarr/core/sync.py b/src/zarr/core/sync.py
index d9b4839e8e..ffb04e764d 100644
--- a/src/zarr/core/sync.py
+++ b/src/zarr/core/sync.py
@@ -6,7 +6,7 @@
 import os
 import threading
 from concurrent.futures import ThreadPoolExecutor, wait
-from typing import TYPE_CHECKING, Any, TypeVar
+from typing import TYPE_CHECKING, TypeVar
 
 from typing_extensions import ParamSpec
 
diff --git a/src/zarr/storage/_obstore.py b/src/zarr/storage/_obstore.py
index 8c2469747d..53f82f8899 100644
--- a/src/zarr/storage/_obstore.py
+++ b/src/zarr/storage/_obstore.py
@@ -4,8 +4,7 @@
 import contextlib
 import pickle
 from collections import defaultdict
-from collections.abc import Iterable
-from typing import TYPE_CHECKING, Any, TypedDict
+from typing import TYPE_CHECKING, TypedDict
 
 from zarr.abc.store import (
     ByteRequest,
@@ -14,7 +13,6 @@
     Store,
     SuffixByteRequest,
 )
-from zarr.core.buffer.core import BufferPrototype
 from zarr.core.config import config
 
 if TYPE_CHECKING:
diff --git a/tests/test_group.py b/tests/test_group.py
index b4dace2568..7cf29c30d9 100644
--- a/tests/test_group.py
+++ b/tests/test_group.py
@@ -1519,7 +1519,6 @@ def test_create_nodes_concurrency_limit(store: MemoryStore) -> None:
     # if create_nodes is sensitive to IO latency,
     # this should take (num_groups * get_latency) seconds
     # otherwise, it should take only marginally more than get_latency seconds
-
     with zarr_config.set({"async.concurrency": 1}):
         start = time.time()
         _ = tuple(sync_group.create_nodes(store=latency_store, nodes=groups))
@@ -2024,9 +2023,7 @@ def test_group_members_concurrency_limit(store: MemoryStore) -> None:
     # if .members is sensitive to IO latency,
     # this should take (num_groups * get_latency) seconds
     # otherwise, it should take only marginally more than get_latency seconds
-    from zarr.core.config import config
-
-    with config.set({"async.concurrency": 1}):
+    with zarr_config.set({"async.concurrency": 1}):
         start = time.time()
         _ = group_read.members()
         elapsed = time.time() - start