diff --git a/poetry.lock b/poetry.lock
index 13b9c916..75fbae78 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -522,23 +522,23 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.
 
 [[package]]
 name = "pytest-asyncio"
-version = "0.18.3"
+version = "0.21.1"
 description = "Pytest support for asyncio"
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "pytest-asyncio-0.18.3.tar.gz", hash = "sha256:7659bdb0a9eb9c6e3ef992eef11a2b3e69697800ad02fb06374a210d85b29f91"},
-    {file = "pytest_asyncio-0.18.3-1-py3-none-any.whl", hash = "sha256:16cf40bdf2b4fb7fc8e4b82bd05ce3fbcd454cbf7b92afc445fe299dabb88213"},
-    {file = "pytest_asyncio-0.18.3-py3-none-any.whl", hash = "sha256:8fafa6c52161addfd41ee7ab35f11836c5a16ec208f93ee388f752bea3493a84"},
+    {file = "pytest-asyncio-0.21.1.tar.gz", hash = "sha256:40a7eae6dded22c7b604986855ea48400ab15b069ae38116e8c01238e9eeb64d"},
+    {file = "pytest_asyncio-0.21.1-py3-none-any.whl", hash = "sha256:8666c1c8ac02631d7c51ba282e0c69a8a452b211ffedf2599099845da5c5c37b"},
 ]
 
 [package.dependencies]
-pytest = ">=6.1.0"
+pytest = ">=7.0.0"
 typing-extensions = {version = ">=3.7.2", markers = "python_version < \"3.8\""}
 
 [package.extras]
-testing = ["coverage (==6.2)", "flaky (>=3.5.0)", "hypothesis (>=5.7.1)", "mypy (==0.931)", "pytest-trio (>=0.7.0)"]
+docs = ["sphinx (>=5.3)", "sphinx-rtd-theme (>=1.0)"]
+testing = ["coverage (>=6.2)", "flaky (>=3.5.0)", "hypothesis (>=5.7.1)", "mypy (>=0.931)", "pytest-trio (>=0.7.0)"]
 
 [[package]]
 name = "python-dateutil"
@@ -854,4 +854,4 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.7"
-content-hash = "0571a5e7f9915ed0bdb908047821b6de254c4df6f86216183855b1de5e7909df"
+content-hash = "922d814fb2679098d6e0ccab5857e838cf0207b8ec5d058ea3a068c4707e58da"
diff --git a/pyproject.toml b/pyproject.toml
index bbb47795..b4f57be9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ mypy = "1.4.1"
 black = "23.3.0"
 respx = "0.19.2"
 pytest = "7.1.1"
-pytest-asyncio = "0.18.3"
+pytest-asyncio = "0.21.1"
 ruff = "0.0.282"
 isort = "5.10.1"
 time-machine = "^2.9.0"
diff --git a/tests/conftest.py b/tests/conftest.py
index 4452b7a7..dd8bbe4c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,4 +1,5 @@
 import asyncio
+from typing import Iterator
 
 import pytest
 
@@ -6,5 +7,7 @@
 
 
 @pytest.fixture(scope="session")
-def event_loop() -> asyncio.AbstractEventLoop:
-    return asyncio.new_event_loop()
+def event_loop() -> Iterator[asyncio.AbstractEventLoop]:
+    loop = asyncio.new_event_loop()
+    yield loop
+    loop.close()