diff --git a/tests/conftest.py b/tests/conftest.py
index 2ae43dc1..0cf63a46 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -126,13 +126,6 @@ class UserManagerMock(BaseTestUserManager[models.UP]):
     _update: MagicMock
 
 
-@pytest.fixture(scope="session")
-def event_loop():
-    loop = asyncio.get_event_loop()
-    yield loop
-    loop.close()
-
-
 AsyncMethodMocker = Callable[..., MagicMock]
 
 
diff --git a/tests/test_authentication_authenticator.py b/tests/test_authentication_authenticator.py
index d2ee48e2..baec8724 100644
--- a/tests/test_authentication_authenticator.py
+++ b/tests/test_authentication_authenticator.py
@@ -2,6 +2,7 @@ from typing import AsyncGenerator, Generic, List, Optional, Sequence
 
 import httpx
 import pytest
+import pytest_asyncio
 from fastapi import Depends, FastAPI, Request, status
 from fastapi.security.base import SecurityBase
 
@@ -66,8 +67,7 @@ def get_backend_user(user: UserModel):
     return _get_backend_user
 
 
-@pytest.fixture
-@pytest.mark.asyncio
+@pytest_asyncio.fixture
 def get_test_auth_client(get_user_manager, get_test_client):
     async def _get_test_auth_client(
         backends: List[AuthenticationBackend],
diff --git a/tests/test_fastapi_users.py b/tests/test_fastapi_users.py
index 5b12de6d..a42aa78a 100644
--- a/tests/test_fastapi_users.py
+++ b/tests/test_fastapi_users.py
@@ -2,14 +2,14 @@ from typing import AsyncGenerator, Optional
 
 import httpx
 import pytest
+import pytest_asyncio
 from fastapi import Depends, FastAPI, status
 
 from fastapi_users import FastAPIUsers, schemas
 from tests.conftest import IDType, User, UserCreate, UserModel, UserUpdate
 
 
-@pytest.fixture
-@pytest.mark.asyncio
+@pytest_asyncio.fixture
 async def test_app_client(
     secret,
     get_user_manager,
diff --git a/tests/test_openapi.py b/tests/test_openapi.py
index 439da25d..3f167f38 100644
--- a/tests/test_openapi.py
+++ b/tests/test_openapi.py
@@ -1,5 +1,6 @@
 import httpx
 import pytest
+import pytest_asyncio
 from fastapi import FastAPI, status
 
 from fastapi_users.fastapi_users import FastAPIUsers
@@ -28,8 +29,7 @@ def test_app(
     return app
 
 
-@pytest.fixture
-@pytest.mark.asyncio
+@pytest_asyncio.fixture
 async def test_app_client(test_app, get_test_client):
     async for client in get_test_client(test_app):
         yield client
diff --git a/tests/test_router_auth.py b/tests/test_router_auth.py
index 4cc65075..8e648b57 100644
--- a/tests/test_router_auth.py
+++ b/tests/test_router_auth.py
@@ -2,6 +2,7 @@ from typing import Any, AsyncGenerator, Dict, Tuple, cast
 
 import httpx
 import pytest
+import pytest_asyncio
 from fastapi import FastAPI, status
 
 from fastapi_users.authentication import Authenticator
@@ -39,10 +40,9 @@ def app_factory(get_user_manager, mock_authentication):
     return _app_factory
 
 
-@pytest.fixture(
+@pytest_asyncio.fixture(
     params=[True, False], ids=["required_verification", "not_required_verification"]
 )
-@pytest.mark.asyncio
 async def test_app_client(
     request, get_test_client, app_factory
 ) -> AsyncGenerator[Tuple[httpx.AsyncClient, bool], None]:
diff --git a/tests/test_router_oauth.py b/tests/test_router_oauth.py
index 22c9a8d3..50ed3ad1 100644
--- a/tests/test_router_oauth.py
+++ b/tests/test_router_oauth.py
@@ -2,6 +2,7 @@ from typing import Any, Dict, cast
 
 import httpx
 import pytest
+import pytest_asyncio
 from fastapi import FastAPI, status
 from httpx_oauth.oauth2 import BaseOAuth2, OAuth2
 
@@ -69,15 +70,13 @@ def test_app_requires_verification(app_factory):
     return app_factory(requires_verification=True)
 
 
-@pytest.fixture
-@pytest.mark.asyncio
+@pytest_asyncio.fixture
 async def test_app_client(test_app, get_test_client):
     async for client in get_test_client(test_app):
         yield client
 
 
-@pytest.fixture
-@pytest.mark.asyncio
+@pytest_asyncio.fixture
 async def test_app_client_redirect_url(test_app_redirect_url, get_test_client):
     async for client in get_test_client(test_app_redirect_url):
         yield client
diff --git a/tests/test_router_register.py b/tests/test_router_register.py
index 7cc0af4f..50f0f61b 100644
--- a/tests/test_router_register.py
+++ b/tests/test_router_register.py
@@ -2,14 +2,14 @@ from typing import Any, AsyncGenerator, Dict, cast
 
 import httpx
 import pytest
+import pytest_asyncio
 from fastapi import FastAPI, status
 
 from fastapi_users.router import ErrorCode, get_register_router
 from tests.conftest import User, UserCreate
 
 
-@pytest.fixture
-@pytest.mark.asyncio
+@pytest_asyncio.fixture
 async def test_app_client(
     get_user_manager, get_test_client
 ) -> AsyncGenerator[httpx.AsyncClient, None]:
diff --git a/tests/test_router_reset.py b/tests/test_router_reset.py
index fdfbb378..55c8b453 100644
--- a/tests/test_router_reset.py
+++ b/tests/test_router_reset.py
@@ -2,6 +2,7 @@ from typing import Any, AsyncGenerator, Dict, cast
 
 import httpx
 import pytest
+import pytest_asyncio
 from fastapi import FastAPI, status
 
 from fastapi_users.exceptions import (
@@ -14,8 +15,7 @@ from fastapi_users.router import ErrorCode, get_reset_password_router
 from tests.conftest import AsyncMethodMocker, UserManagerMock
 
 
-@pytest.fixture
-@pytest.mark.asyncio
+@pytest_asyncio.fixture
 async def test_app_client(
     get_user_manager, get_test_client
 ) -> AsyncGenerator[httpx.AsyncClient, None]:
diff --git a/tests/test_router_users.py b/tests/test_router_users.py
index eda71f37..b6427c50 100644
--- a/tests/test_router_users.py
+++ b/tests/test_router_users.py
@@ -2,6 +2,7 @@ from typing import Any, AsyncGenerator, Dict, Tuple, cast
 
 import httpx
 import pytest
+import pytest_asyncio
 from fastapi import FastAPI, status
 
 from fastapi_users.authentication import Authenticator
@@ -33,10 +34,9 @@ def app_factory(get_user_manager, mock_authentication):
     return _app_factory
 
 
-@pytest.fixture(
+@pytest_asyncio.fixture(
     params=[True, False], ids=["required_verification", "not_required_verification"]
 )
-@pytest.mark.asyncio
 async def test_app_client(
     request, get_test_client, app_factory
 ) -> AsyncGenerator[Tuple[httpx.AsyncClient, bool], None]:
diff --git a/tests/test_router_verify.py b/tests/test_router_verify.py
index 488135ba..e798e84a 100644
--- a/tests/test_router_verify.py
+++ b/tests/test_router_verify.py
@@ -2,6 +2,7 @@ from typing import Any, AsyncGenerator, Dict, cast
 
 import httpx
 import pytest
+import pytest_asyncio
 from fastapi import FastAPI, status
 
 from fastapi_users.exceptions import (
@@ -14,8 +15,7 @@ from fastapi_users.router import ErrorCode, get_verify_router
 from tests.conftest import AsyncMethodMocker, User, UserManagerMock, UserModel
 
 
-@pytest.fixture
-@pytest.mark.asyncio
+@pytest_asyncio.fixture
 async def test_app_client(
     get_user_manager,
     get_test_client,