diff --git a/pyproject.toml b/pyproject.toml
index 13760dd..9a92c46 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,6 +25,44 @@ dependencies = [
     'universal_pathlib>=0.2.0'
 ]
 
+[project.optional-dependencies]
+test = [
+    "coverage",
+    "pytest",
+    "pytest-cov",
+    "msgpack",
+    "lmdb",
+    "s3fs",
+    "pytest-asyncio",
+    "moto[s3]",
+    "flask-cors",
+    "flask",
+    "requests",
+    "mypy",
+    "hypothesis"
+]
+
 [tool.maturin]
 module-name = "zarrs_python.zarrs_python_internal"
-features = ["pyo3/extension-module"]
\ No newline at end of file
+features = ["pyo3/extension-module"]
+
+
+[tool.pytest.ini_options]
+minversion = "7"
+testpaths = ["tests"]
+log_cli_level = "INFO"
+xfail_strict = true
+asyncio_mode = "auto"
+doctest_optionflags = [
+    "NORMALIZE_WHITESPACE",
+    "ELLIPSIS",
+    "IGNORE_EXCEPTION_DETAIL",
+]
+addopts = [
+    "--durations=10", "-ra", "--strict-config", "--strict-markers",
+]
+filterwarnings = [
+    "error:::zarr.*",
+    "ignore:PY_SSIZE_T_CLEAN will be required.*:DeprecationWarning",
+    "ignore:The loop argument is deprecated since Python 3.8.*:DeprecationWarning",
+]
\ No newline at end of file
diff --git a/zarrs_python b/zarrs_python
index b3dec74..020b46d 160000
--- a/zarrs_python
+++ b/zarrs_python
@@ -1 +1 @@
-Subproject commit b3dec74ddde75e7d6451ec28827172987882ddb2
+Subproject commit 020b46d7e3aeb101c8d117d2ec39ea2a037dd106