diff --git a/pyproject.toml b/pyproject.toml
index 493b18822a..02e66c67e8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -459,7 +459,6 @@ filterwarnings = [
     "ignore:Exception ignored ((on calling weakref callback)|(in[\\s\\S]*Session was never entered)):pytest.PytestUnraisableExceptionWarning",
 ]
 markers = [
-    "asyncio: mark test as asyncio test",
     "gpu: mark a test as requiring CuPy and GPU",
     "s3: mark a test as requiring a (mock) S3 backend via moto",
     "slow_hypothesis: slow hypothesis tests",
diff --git a/tests/conftest.py b/tests/conftest.py
index 031c4a4283..c02daf7663 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -54,8 +54,6 @@
     from contextlib import AbstractContextManager
     from typing import Any, Literal
 
-    from _pytest.compat import LEGACY_PATH
-
     from zarr.abc.codec import Codec
     from zarr.core.array import CompressorsLike, FiltersLike, SerializerLike, ShardsLike
     from zarr.core.chunk_key_encodings import (
@@ -121,14 +119,14 @@ def path_type(request: pytest.FixtureRequest) -> Any:
 
 # todo: harmonize this with local_store fixture
 @pytest.fixture
-async def store_path(tmpdir: LEGACY_PATH) -> StorePath:
-    store = await LocalStore.open(str(tmpdir))
+async def store_path(tmp_path: pathlib.Path) -> StorePath:
+    store = await LocalStore.open(str(tmp_path))
     return StorePath(store)
 
 
 @pytest.fixture
-async def local_store(tmpdir: LEGACY_PATH) -> LocalStore:
-    return await LocalStore.open(str(tmpdir))
+async def local_store(tmp_path: pathlib.Path) -> LocalStore:
+    return await LocalStore.open(str(tmp_path))
 
 
 @pytest.fixture
@@ -142,26 +140,27 @@ async def memory_store() -> MemoryStore:
 
 
 @pytest.fixture
-async def zip_store(tmpdir: LEGACY_PATH) -> ZipStore:
-    return await ZipStore.open(str(tmpdir / "zarr.zip"), mode="w")
+async def zip_store(tmp_path: pathlib.Path) -> ZipStore:
+    return await ZipStore.open(str(tmp_path / "zarr.zip"), mode="w")
 
 
 @pytest.fixture
-async def store(request: pytest.FixtureRequest, tmpdir: LEGACY_PATH) -> Store:
+async def store(request: pytest.FixtureRequest, tmp_path: pathlib.Path) -> Store:
     param = request.param
-    return await parse_store(param, str(tmpdir))
+    return await parse_store(param, str(tmp_path))
 
 
 @pytest.fixture
-async def store2(request: pytest.FixtureRequest, tmpdir: LEGACY_PATH) -> Store:
+async def store2(request: pytest.FixtureRequest, tmp_path: pathlib.Path) -> Store:
     """Fixture to create a second store for testing copy operations between stores"""
     param = request.param
-    store2_path = tmpdir.mkdir("store2")
+    store2_path = tmp_path / "store2"
+    store2_path.mkdir()
     return await parse_store(param, str(store2_path))
 
 
 @pytest.fixture(params=["local", "memory", "zip"])
-def sync_store(request: pytest.FixtureRequest, tmp_path: LEGACY_PATH) -> Store:
+def sync_store(request: pytest.FixtureRequest, tmp_path: pathlib.Path) -> Store:
     result = sync(parse_store(request.param, str(tmp_path)))
     if not isinstance(result, Store):
         raise TypeError(f"Wrong store class returned by test fixture! got {result} instead")
@@ -176,10 +175,10 @@ class AsyncGroupRequest:
 
 
 @pytest.fixture
-async def async_group(request: pytest.FixtureRequest, tmpdir: LEGACY_PATH) -> AsyncGroup:
+async def async_group(request: pytest.FixtureRequest, tmp_path: pathlib.Path) -> AsyncGroup:
     param: AsyncGroupRequest = request.param
 
-    store = await parse_store(param.store, str(tmpdir))
+    store = await parse_store(param.store, str(tmp_path))
     return await AsyncGroup.from_store(
         store,
         attributes=param.attributes,
diff --git a/tests/test_api.py b/tests/test_api.py
index 788519969d..121f02c7b2 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -293,7 +293,6 @@ def test_open_array_rectilinear_chunks(tmp_path: Path) -> None:
     assert z.read_chunk_sizes == ((3, 3, 4), (5, 5))
 
 
-@pytest.mark.asyncio
 async def test_async_array_open_array_not_found() -> None:
     """Test that AsyncArray.open raises ArrayNotFoundError when array doesn't exist"""
     store = MemoryStore()
@@ -352,16 +351,16 @@ async def test_open_group(memory_store: MemoryStore) -> None:
 
 
 @pytest.mark.parametrize("zarr_format", [None, 2, 3])
-async def test_open_group_unspecified_version(tmpdir: Path, zarr_format: ZarrFormat) -> None:
+async def test_open_group_unspecified_version(tmp_path: Path, zarr_format: ZarrFormat) -> None:
     """Regression test for https://github.com/zarr-developers/zarr-python/issues/2175"""
 
     # create a group with specified zarr format (could be 2, 3, or None)
     _ = await zarr.api.asynchronous.open_group(
-        store=str(tmpdir), mode="w", zarr_format=zarr_format, attributes={"foo": "bar"}
+        store=str(tmp_path), mode="w", zarr_format=zarr_format, attributes={"foo": "bar"}
     )
 
     # now open that group without specifying the format
-    g2 = await zarr.api.asynchronous.open_group(store=str(tmpdir), mode="r")
+    g2 = await zarr.api.asynchronous.open_group(store=str(tmp_path), mode="r")
 
     assert g2.attrs == {"foo": "bar"}
 
diff --git a/tests/test_api/test_synchronous.py b/tests/test_api/test_synchronous.py
index 9e4aab438d..9b15ec32f6 100644
--- a/tests/test_api/test_synchronous.py
+++ b/tests/test_api/test_synchronous.py
@@ -44,7 +44,7 @@ def test_docstrings_match(callable_name: str) -> None:
 @pytest.mark.parametrize(
     ("parameter_name", "array_creation_routines"),
     [
-        (
+        pytest.param(
             ("store", "path"),
             (
                 asynchronous.create_array,
@@ -54,8 +54,9 @@ def test_docstrings_match(callable_name: str) -> None:
                 zarr.AsyncGroup.create_array,
                 zarr.Group.create_array,
             ),
+            id="store-path-create_array_group",
         ),
-        (
+        pytest.param(
             (
                 "store",
                 "path",
@@ -65,8 +66,9 @@ def test_docstrings_match(callable_name: str) -> None:
                 synchronous.create,
                 zarr.Group.create,
             ),
+            id="store-path-create",
         ),
-        (
+        pytest.param(
             (
                 (
                     "filters",
@@ -87,9 +89,9 @@ def test_docstrings_match(callable_name: str) -> None:
                 zarr.AsyncGroup.create_array,
                 zarr.Group.create_array,
             ),
+            id="encoding-params-create_and_array",
         ),
     ],
-    ids=str,
 )
 def test_docstring_consistent_parameters(
     parameter_name: str, array_creation_routines: tuple[Callable[[Any], Any], ...]
diff --git a/tests/test_buffer.py b/tests/test_buffer.py
index b50e5abb67..b4a16ed1de 100644
--- a/tests/test_buffer.py
+++ b/tests/test_buffer.py
@@ -44,7 +44,6 @@ def test_nd_array_like(xp: types.ModuleType) -> None:
     assert isinstance(ary, NDArrayLike)
 
 
-@pytest.mark.asyncio
 async def test_async_array_prototype() -> None:
     """Test the use of a custom buffer prototype"""
 
@@ -73,7 +72,6 @@ async def test_async_array_prototype() -> None:
 
 
 @gpu_test
-@pytest.mark.asyncio
 async def test_async_array_gpu_prototype() -> None:
     """Test the use of the GPU buffer prototype"""
 
@@ -97,7 +95,6 @@ async def test_async_array_gpu_prototype() -> None:
     assert cp.array_equal(expect, got)
 
 
-@pytest.mark.asyncio
 async def test_codecs_use_of_prototype() -> None:
     expect = np.zeros((10, 10), dtype="uint16", order="F")
     a = await zarr.api.asynchronous.create_array(
@@ -126,7 +123,6 @@ async def test_codecs_use_of_prototype() -> None:
 
 
 @gpu_test
-@pytest.mark.asyncio
 async def test_codecs_use_of_gpu_prototype() -> None:
     expect = cp.zeros((10, 10), dtype="uint16", order="F")
     a = await zarr.api.asynchronous.create_array(
@@ -155,7 +151,6 @@ async def test_codecs_use_of_gpu_prototype() -> None:
 
 
 @gpu_test
-@pytest.mark.asyncio
 async def test_sharding_use_of_gpu_prototype() -> None:
     with zarr.config.enable_gpu():
         expect = cp.zeros((10, 10), dtype="uint16", order="F")
diff --git a/tests/test_docs.py b/tests/test_docs.py
index 02dca225b0..9c42a0521a 100644
--- a/tests/test_docs.py
+++ b/tests/test_docs.py
@@ -12,7 +12,6 @@
 
 from __future__ import annotations
 
-import os
 from collections import defaultdict
 from pathlib import Path
 from typing import TYPE_CHECKING, Any
@@ -82,7 +81,9 @@ def _session_params(root: Path) -> list[Any]:
 
 
 @pytest.fixture
-def docs_s3_backend(moto_server: str) -> Generator[None, None, None]:
+def docs_s3_backend(
+    moto_server: str, monkeypatch: pytest.MonkeyPatch
+) -> Generator[None, None, None]:
     """Point docs S3 examples at the shared moto server (tests/conftest.py) via a
     process-wide AWS_ENDPOINT_URL, so a block can use a bare s3:// URL with no
     storage_options (see spike in the design notes). The server lifecycle belongs to the
@@ -92,8 +93,7 @@ def docs_s3_backend(moto_server: str) -> Generator[None, None, None]:
     botocore = pytest.importorskip("botocore")
     requests = pytest.importorskip("requests")
 
-    prev_endpoint = os.environ.get("AWS_ENDPOINT_URL")
-    os.environ["AWS_ENDPOINT_URL"] = moto_server
+    monkeypatch.setenv("AWS_ENDPOINT_URL", moto_server)
 
     session = botocore.session.Session()
     client = session.create_client("s3", endpoint_url=moto_server, region_name="us-east-1")
@@ -103,15 +103,9 @@ def docs_s3_backend(moto_server: str) -> Generator[None, None, None]:
     try:
         yield
     finally:
-        # Reset moto state and restore AWS_ENDPOINT_URL; the shared server keeps running
-        # (the moto_server fixture stops it at session end).
-        try:
-            requests.post(f"{moto_server}moto-api/reset")
-        finally:
-            if prev_endpoint is None:
-                os.environ.pop("AWS_ENDPOINT_URL", None)
-            else:
-                os.environ["AWS_ENDPOINT_URL"] = prev_endpoint
+        # Reset moto state; AWS_ENDPOINT_URL is restored automatically by monkeypatch.
+        # The shared server keeps running (the moto_server fixture stops it at session end).
+        requests.post(f"{moto_server}moto-api/reset")
 
 
 def test_markers_attribute_is_parsed(tmp_path: Path) -> None:
diff --git a/tests/test_group.py b/tests/test_group.py
index e05df0dfcb..692b88c8af 100644
--- a/tests/test_group.py
+++ b/tests/test_group.py
@@ -54,17 +54,16 @@
 from .conftest import meta_from_array, parse_store
 
 if TYPE_CHECKING:
+    import pathlib
     from collections.abc import Callable
 
-    from _pytest.compat import LEGACY_PATH
-
     from zarr.core.buffer.core import Buffer
     from zarr.core.common import JSON, ZarrFormat
 
 
 @pytest.fixture(params=["local", "memory", "zip"])
-async def store(request: pytest.FixtureRequest, tmpdir: LEGACY_PATH) -> Store:
-    result = await parse_store(request.param, str(tmpdir))
+async def store(request: pytest.FixtureRequest, tmp_path: pathlib.Path) -> Store:
+    result = await parse_store(request.param, str(tmp_path))
     if not isinstance(result, Store):
         raise TypeError(f"Wrong store class returned by test fixture! got {result} instead")
     return result
diff --git a/tests/test_properties.py b/tests/test_properties.py
index 3f71fdf493..33888bfd4e 100644
--- a/tests/test_properties.py
+++ b/tests/test_properties.py
@@ -119,7 +119,6 @@ def test_array_creates_implicit_groups(array):
 # this decorator removes timeout; not ideal but it should avoid intermittent CI failures
 
 
-@pytest.mark.asyncio
 @settings(deadline=None)
 @pytest.mark.filterwarnings("ignore::zarr.core.dtype.common.UnstableSpecificationWarning")
 @given(data=st.data())
@@ -146,7 +145,6 @@ async def test_basic_indexing(data: st.DataObject) -> None:
     # TODO test async setitem?
 
 
-@pytest.mark.asyncio
 @settings(deadline=None)
 @pytest.mark.filterwarnings("ignore::zarr.core.dtype.common.UnstableSpecificationWarning")
 @given(data=st.data())
@@ -156,7 +154,6 @@ async def test_basic_indexing_complex_rectilinear(data: st.DataObject) -> None:
     assert_array_equal(nparray[indexer], zarray[indexer])
 
 
-@pytest.mark.asyncio
 @given(data=st.data())
 @pytest.mark.filterwarnings("ignore::zarr.core.dtype.common.UnstableSpecificationWarning")
 async def test_oindex(data: st.DataObject) -> None:
@@ -193,7 +190,6 @@ async def test_oindex(data: st.DataObject) -> None:
     # note: async oindex setitem not yet implemented
 
 
-@pytest.mark.asyncio
 @given(data=st.data())
 @pytest.mark.filterwarnings("ignore::zarr.core.dtype.common.UnstableSpecificationWarning")
 async def test_vindex(data: st.DataObject) -> None:
diff --git a/tests/test_store/test_core.py b/tests/test_store/test_core.py
index f2c81b87f9..0ba0330d08 100644
--- a/tests/test_store/test_core.py
+++ b/tests/test_store/test_core.py
@@ -4,7 +4,6 @@
 from typing import Any, Literal
 
 import pytest
-from _pytest.compat import LEGACY_PATH
 
 import zarr
 from zarr import Group
@@ -163,7 +162,7 @@ async def test_make_store_path_none(path: str) -> None:
 @pytest.mark.parametrize("store_type", [str, Path])
 @pytest.mark.parametrize("mode", ["r", "w"])
 async def test_make_store_path_local(
-    tmpdir: LEGACY_PATH,
+    tmp_path: Path,
     store_type: type[str] | type[Path] | type[LocalStore],
     path: str,
     mode: AccessModeLiteral,
@@ -171,10 +170,10 @@ async def test_make_store_path_local(
     """
     Test the various ways of invoking make_store_path that create a LocalStore
     """
-    store_like = store_type(str(tmpdir))
+    store_like = store_type(str(tmp_path))
     store_path = await make_store_path(store_like, path=path, mode=mode)
     assert isinstance(store_path.store, LocalStore)
-    assert Path(store_path.store.root) == Path(tmpdir)
+    assert Path(store_path.store.root) == Path(tmp_path)
     assert store_path.path == normalize_path(path)
     assert store_path.read_only == (mode == "r")
 
@@ -336,7 +335,7 @@ def test_relativize_path_invalid() -> None:
         _relativize_path(path="a/b/c", prefix="b")
 
 
-def test_different_open_mode(tmp_path: LEGACY_PATH) -> None:
+def test_different_open_mode(tmp_path: Path) -> None:
     # Test with a store that implements .with_read_only()
     store = MemoryStore()
     zarr.create((100,), store=store, zarr_format=2, path="a")
diff --git a/tests/test_store/test_local.py b/tests/test_store/test_local.py
index 6756bc83d9..c4536e5c49 100644
--- a/tests/test_store/test_local.py
+++ b/tests/test_store/test_local.py
@@ -29,8 +29,8 @@ async def set(self, store: LocalStore, key: str, value: Buffer) -> None:
         (store.root / key).write_bytes(value.to_bytes())
 
     @pytest.fixture
-    def store_kwargs(self, tmpdir: str) -> dict[str, str]:
-        return {"root": str(tmpdir)}
+    def store_kwargs(self, tmp_path: pathlib.Path) -> dict[str, str]:
+        return {"root": str(tmp_path)}
 
     def test_store_repr(self, store: LocalStore) -> None:
         assert str(store) == f"file://{store.root.as_posix()}"