diff --git a/tests/integration/conftest.py b/tests/integration/conftest.py
index 1824007a..6a2ba376 100644
--- a/tests/integration/conftest.py
+++ b/tests/integration/conftest.py
@@ -74,13 +74,13 @@ def event_loop() -> Iterator[asyncio.AbstractEventLoop]:
     loop.close()
 
 
-@pytest.fixture()
+@pytest.fixture
 def platform_auth_server(docker_ip: str, docker_services: Services) -> URL:
     port = docker_services.port_for("platform-auth", 8080)
     return URL(f"http://{docker_ip}:{port}")
 
 
-@pytest.fixture()
+@pytest.fixture
 async def platform_api_server(
     unused_tcp_port_factory: Callable[[], int],
     platform_api_app: aiohttp.web.Application,
@@ -91,7 +91,7 @@ async def platform_api_server(
         yield URL.build(scheme="http", host=address.host, port=address.port)
 
 
-@pytest.fixture()
+@pytest.fixture
 async def platform_config_server(
     unused_tcp_port_factory: Callable[[], int],
     platform_config_app: aiohttp.web.Application,
@@ -102,14 +102,14 @@ async def platform_config_server(
         yield URL.build(scheme="http", host=address.host, port=address.port)
 
 
-@pytest.fixture()
+@pytest.fixture
 def platform_auth_config(
     platform_auth_server: URL, service_token: str
 ) -> PlatformAuthConfig:
     return PlatformAuthConfig(url=platform_auth_server, token=service_token)
 
 
-@pytest.fixture()
+@pytest.fixture
 def platform_api_config(
     platform_api_server: URL, service_token: str
 ) -> PlatformServiceConfig:
@@ -118,14 +118,14 @@ def platform_api_config(
     )
 
 
-@pytest.fixture()
+@pytest.fixture
 def platform_config_config(
     platform_config_server: URL, service_token: str
 ) -> PlatformServiceConfig:
     return PlatformServiceConfig(url=platform_config_server, token=service_token)
 
 
-@pytest.fixture()
+@pytest.fixture
 def metrics_exporter_config(
     unused_tcp_port_factory: Callable[[], int],
     platform_config_config: PlatformServiceConfig,
@@ -143,7 +143,7 @@ def metrics_exporter_config(
     )
 
 
-@pytest.fixture()
+@pytest.fixture
 async def metrics_exporter_server_factory() -> (
     Callable[[MetricsExporterConfig], AbstractAsyncContextManager[URL]]
 ):
@@ -160,7 +160,7 @@ async def _create(
     return _create
 
 
-@pytest.fixture()
+@pytest.fixture
 async def metrics_exporter_server(
     metrics_exporter_server_factory: Callable[
         [MetricsExporterConfig], AbstractAsyncContextManager[URL]
@@ -171,13 +171,13 @@ async def metrics_exporter_server(
         yield server
 
 
-@pytest.fixture()
+@pytest.fixture
 def thanos_query_url(docker_ip: str, docker_services: Services) -> URL:
     port = docker_services.port_for("thanos-query", 9091)
     return URL(f"http://{docker_ip}:{port}")
 
 
-@pytest.fixture()
+@pytest.fixture
 def prometheus_proxy_config(
     unused_tcp_port_factory: Callable[[], int],
     platform_auth_config: PlatformAuthConfig,
@@ -194,7 +194,7 @@ def prometheus_proxy_config(
     )
 
 
-@pytest.fixture()
+@pytest.fixture
 async def prometheus_proxy_server(
     prometheus_proxy_config: PrometheusProxyConfig,
 ) -> AsyncIterator[URL]:
@@ -205,13 +205,13 @@ async def prometheus_proxy_server(
         yield URL.build(scheme="http", host=address.host, port=address.port)
 
 
-@pytest.fixture()
+@pytest.fixture
 def grafana_url(docker_ip: str, docker_services: Services) -> URL:
     port = docker_services.port_for("grafana", 3000)
     return URL(f"http://{docker_ip}:{port}")
 
 
-@pytest.fixture()
+@pytest.fixture
 def grafana_proxy_config(
     unused_tcp_port_factory: Callable[[], int],
     platform_auth_config: PlatformAuthConfig,
@@ -228,7 +228,7 @@ def grafana_proxy_config(
     )
 
 
-@pytest.fixture()
+@pytest.fixture
 async def grafana_proxy_server(
     grafana_proxy_config: GrafanaProxyConfig,
 ) -> AsyncIterator[URL]:
@@ -239,13 +239,13 @@ async def grafana_proxy_server(
         yield URL.build(scheme="http", host=address.host, port=address.port)
 
 
-@pytest.fixture()
+@pytest.fixture
 async def client() -> AsyncIterator[aiohttp.ClientSession]:
     async with aiohttp.ClientSession() as session:
         yield session
 
 
-@pytest.fixture()
+@pytest.fixture
 def metrics_api_config(
     unused_tcp_port_factory: Callable[[], int],
     platform_auth_config: PlatformAuthConfig,
@@ -262,7 +262,7 @@ def metrics_api_config(
     )
 
 
-@pytest.fixture()
+@pytest.fixture
 async def metrics_api_server(
     metrics_api_config: MetricsApiConfig,
 ) -> AsyncIterator[URL]:
@@ -273,7 +273,7 @@ async def metrics_api_server(
         yield address.http_url
 
 
-@pytest.fixture()
+@pytest.fixture
 async def exit_stack() -> AsyncIterator[AsyncExitStack]:
     async with AsyncExitStack() as stack:
         yield stack
diff --git a/tests/integration/conftest_kube.py b/tests/integration/conftest_kube.py
index cc7f6370..69d53048 100644
--- a/tests/integration/conftest_kube.py
+++ b/tests/integration/conftest_kube.py
@@ -82,7 +82,7 @@ async def __call__(
         pass
 
 
-@pytest.fixture()
+@pytest.fixture
 async def kube_pod_factory(kube_client: KubeClient) -> AsyncIterator[KubePodFactory]:
     pods = []
 
diff --git a/tests/integration/conftest_platform_api.py b/tests/integration/conftest_platform_api.py
index a60651ca..2b6e1726 100644
--- a/tests/integration/conftest_platform_api.py
+++ b/tests/integration/conftest_platform_api.py
@@ -2,7 +2,7 @@
 import pytest
 
 
-@pytest.fixture()
+@pytest.fixture
 def platform_api_app() -> aiohttp.web.Application:
     async def _get_config(request: aiohttp.web.Request) -> aiohttp.web.Response:
         return aiohttp.web.json_response(
diff --git a/tests/integration/conftest_platform_auth.py b/tests/integration/conftest_platform_auth.py
index 0bb35167..43b8176f 100644
--- a/tests/integration/conftest_platform_auth.py
+++ b/tests/integration/conftest_platform_auth.py
@@ -13,7 +13,7 @@
 _JWT_SECRET = "secret"
 
 
-@pytest.fixture()
+@pytest.fixture
 def token_factory() -> Callable[[str], str]:
     def _create(name: str) -> str:
         payload = {"https://platform.neuromation.io/user": name}
@@ -30,7 +30,7 @@ class User(AuthUser):
 UserFactory = Callable[[str, Sequence[Permission]], Awaitable[User]]
 
 
-@pytest.fixture()
+@pytest.fixture
 def user_factory(
     token_factory: Callable[[str], str], platform_auth_server: URL
 ) -> UserFactory:
@@ -50,7 +50,7 @@ async def _create(name: str, permissions: Sequence[Permission] = ()) -> User:
     return _create
 
 
-@pytest.fixture()
+@pytest.fixture
 async def service_token(
     user_factory: UserFactory, token_factory: Callable[[str], str]
 ) -> str:
@@ -58,7 +58,7 @@ async def service_token(
     return token_factory("cluster")
 
 
-@pytest.fixture()
+@pytest.fixture
 async def cluster_admin_token(user_factory: UserFactory) -> str:
     user = await user_factory(
         "cluster-admin",
@@ -70,7 +70,7 @@ async def cluster_admin_token(user_factory: UserFactory) -> str:
     return user.token
 
 
-@pytest.fixture()
+@pytest.fixture
 async def regular_user_token(user_factory: UserFactory) -> str:
     user = await user_factory(
         "user",
@@ -82,7 +82,7 @@ async def regular_user_token(user_factory: UserFactory) -> str:
     return user.token
 
 
-@pytest.fixture()
+@pytest.fixture
 async def other_cluster_user_token(user_factory: UserFactory) -> str:
     user = await user_factory(
         "other-user",
diff --git a/tests/integration/conftest_platform_config.py b/tests/integration/conftest_platform_config.py
index 3f246c30..9617c54e 100644
--- a/tests/integration/conftest_platform_config.py
+++ b/tests/integration/conftest_platform_config.py
@@ -5,7 +5,7 @@
 from neuro_config_client.factories import NodeRole
 
 
-@pytest.fixture()
+@pytest.fixture
 def platform_config_app() -> aiohttp.web.Application:
     async def _get_cluster(request: aiohttp.web.Request) -> aiohttp.web.Response:
         name = request.match_info["cluster_name"]
diff --git a/tests/integration/test_api.py b/tests/integration/test_api.py
index f72f7a90..ab1fb4f8 100644
--- a/tests/integration/test_api.py
+++ b/tests/integration/test_api.py
@@ -333,7 +333,7 @@ async def test_dashboard_forbidden(
 
 
 class TestMetricsApi:
-    @pytest.fixture()
+    @pytest.fixture
     async def user(self, user_factory: UserFactory) -> User:
         return await user_factory(
             str(uuid.uuid4()), [Permission("cluster://default", "read")]
diff --git a/tests/integration/test_kube_client.py b/tests/integration/test_kube_client.py
index 854e7912..c6318549 100644
--- a/tests/integration/test_kube_client.py
+++ b/tests/integration/test_kube_client.py
@@ -18,7 +18,7 @@
 
 
 class TestKubeClientTokenUpdater:
-    @pytest.fixture()
+    @pytest.fixture
     async def kube_app(self) -> aiohttp.web.Application:
         async def _get_pods(request: aiohttp.web.Request) -> aiohttp.web.Response:
             auth = request.headers["Authorization"]
@@ -33,7 +33,7 @@ async def _get_pods(request: aiohttp.web.Request) -> aiohttp.web.Response:
         )
         return app
 
-    @pytest.fixture()
+    @pytest.fixture
     async def kube_server(
         self, kube_app: aiohttp.web.Application, unused_tcp_port_factory: Any
     ) -> AsyncIterator[str]:
@@ -42,14 +42,14 @@ async def kube_server(
         ) as address:
             yield f"http://{address.host}:{address.port}"
 
-    @pytest.fixture()
+    @pytest.fixture
     def kube_token_path(self) -> Iterator[str]:
         _, path = tempfile.mkstemp()
         Path(path).write_text("token-1")
         yield path
         Path(path).unlink()
 
-    @pytest.fixture()
+    @pytest.fixture
     async def kube_client(
         self, kube_server: str, kube_token_path: str
     ) -> AsyncIterator[KubeClient]:
diff --git a/tests/integration/test_metrics.py b/tests/integration/test_metrics.py
index ba7e66f1..dcb9452f 100644
--- a/tests/integration/test_metrics.py
+++ b/tests/integration/test_metrics.py
@@ -26,7 +26,7 @@ def cluster(self) -> Cluster:
         return self._cluster
 
 
-@pytest.fixture()
+@pytest.fixture
 def cluster() -> Cluster:
     return Cluster(
         name="default",
@@ -50,13 +50,13 @@ def cluster() -> Cluster:
     )
 
 
-@pytest.fixture()
+@pytest.fixture
 def cluster_holder(cluster: Cluster) -> ClusterHolder:
     return _TestClusterHolder(cluster)
 
 
 class TestPodCreditsCollector:
-    @pytest.fixture()
+    @pytest.fixture
     def collector(
         self, kube_client: KubeClient, kube_node: Node, cluster_holder: ClusterHolder
     ) -> PodCreditsCollector:
diff --git a/tests/integration/test_metrics_service.py b/tests/integration/test_metrics_service.py
index d3cc42c6..e5b6c836 100644
--- a/tests/integration/test_metrics_service.py
+++ b/tests/integration/test_metrics_service.py
@@ -31,19 +31,19 @@ async def _post_query_range(
         return aiohttp.web.json_response({})
 
 
-@pytest.fixture()
+@pytest.fixture
 def prometheus_handler() -> PrometheusHandler:
     return PrometheusHandler()
 
 
-@pytest.fixture()
+@pytest.fixture
 def prometheus_app(prometheus_handler: PrometheusHandler) -> aiohttp.web.Application:
     app = aiohttp.web.Application()
     app.router.add_post("/api/v1/query_range", prometheus_handler.do_post_query_range)
     return app
 
 
-@pytest.fixture()
+@pytest.fixture
 async def prometheus_test_client(
     aiohttp_client: Callable[[aiohttp.web.Application], Awaitable[TestClient]],
     prometheus_app: aiohttp.web.Application,
@@ -51,7 +51,7 @@ async def prometheus_test_client(
     return await aiohttp_client(prometheus_app)
 
 
-@pytest.fixture()
+@pytest.fixture
 def prometheus_client(
     prometheus_test_client: TestClient,
 ) -> PrometheusClient:
@@ -62,7 +62,7 @@ def prometheus_client(
 
 
 class TestMetricsService:
-    @pytest.fixture()
+    @pytest.fixture
     def metrics_service(self, prometheus_client: PrometheusClient) -> MetricsService:
         return MetricsService(prometheus_client=prometheus_client)
 
diff --git a/tests/unit/test_auth.py b/tests/unit/test_auth.py
index 2322ada5..3f3555e3 100644
--- a/tests/unit/test_auth.py
+++ b/tests/unit/test_auth.py
@@ -16,7 +16,7 @@
 JOB_ID = "job-00000000-0000-0000-0000-000000000000"
 
 
-@pytest.fixture()
+@pytest.fixture
 def job_factory() -> Callable[[str], Job]:
     def _factory(id_: str) -> Job:
         return Job(
@@ -36,14 +36,14 @@ def _factory(id_: str) -> Job:
     return _factory
 
 
-@pytest.fixture()
+@pytest.fixture
 def auth_client() -> mock.AsyncMock:
     client = mock.AsyncMock(AuthClient)
     client.get_missing_permissions = mock.AsyncMock(return_value=[])
     return client
 
 
-@pytest.fixture()
+@pytest.fixture
 def api_client(job_factory: Callable[[str], Job]) -> mock.AsyncMock:
     async def get_job(id_: str) -> Job:
         return job_factory(id_)
@@ -54,7 +54,7 @@ async def get_job(id_: str) -> Job:
 
 
 class TestDashboards:
-    @pytest.fixture()
+    @pytest.fixture
     def auth_service(
         self, auth_client: AuthClient, api_client: ApiClient
     ) -> AuthService:
@@ -124,7 +124,7 @@ async def get_missing_permissions(
 
 
 class TestAuthService:
-    @pytest.fixture()
+    @pytest.fixture
     def service(self, auth_client: AuthClient, api_client: ApiClient) -> AuthService:
         return AuthService(auth_client, api_client, "default")
 
diff --git a/tests/unit/test_metrics.py b/tests/unit/test_metrics.py
index efc1c071..b5eb5f28 100644
--- a/tests/unit/test_metrics.py
+++ b/tests/unit/test_metrics.py
@@ -65,17 +65,17 @@ def cluster(self) -> Cluster:
         return self._cluster
 
 
-@pytest.fixture()
+@pytest.fixture
 def cluster_holder(cluster: Cluster) -> ClusterHolder:
     return _TestClusterHolder(cluster)
 
 
 class TestCollector:
-    @pytest.fixture()
+    @pytest.fixture
     def collector(self) -> Collector[Price]:
         return Collector(Price(), interval_s=0.1)
 
-    @pytest.fixture()
+    @pytest.fixture
     def price_factory(self, collector: Collector[Price]) -> Iterator[mock.Mock]:
         price = Price(currency="USD", value=Decimal(1))
         with mock.patch.object(
@@ -100,7 +100,7 @@ async def test_update(
 
 
 class TestConfigPriceCollector:
-    @pytest.fixture()
+    @pytest.fixture
     def cluster(self) -> Cluster:
         return Cluster(
             name="default",
@@ -124,7 +124,7 @@ def cluster(self) -> Cluster:
             ),
         )
 
-    @pytest.fixture()
+    @pytest.fixture
     async def collector_factory(
         self, cluster_holder: ClusterHolder
     ) -> Callable[..., AbstractAsyncContextManager[ConfigPriceCollector]]:
@@ -164,15 +164,15 @@ async def test_get_latest_value_unknown_node_pool(
 
 
 class TestAWSNodePriceCollector:
-    @pytest.fixture()
+    @pytest.fixture
     def pricing_client(self) -> mock.AsyncMock:
         return mock.AsyncMock()
 
-    @pytest.fixture()
+    @pytest.fixture
     def ec2_client(self) -> mock.AsyncMock:
         return mock.AsyncMock()
 
-    @pytest.fixture()
+    @pytest.fixture
     def collector_factory(
         self, pricing_client: AioBaseClient, ec2_client: AioBaseClient
     ) -> Callable[..., AbstractAsyncContextManager[AWSNodePriceCollector]]:
@@ -345,7 +345,7 @@ async def test_get_latest_spot_value_no_history(
 
 
 class TestGCPNodePriceCollector:
-    @pytest.fixture()
+    @pytest.fixture
     def cluster(self) -> Cluster:
         return Cluster(
             name="default",
@@ -378,7 +378,7 @@ def cluster(self) -> Cluster:
             ),
         )
 
-    @pytest.fixture()
+    @pytest.fixture
     def google_service_skus(self) -> dict[str, Any]:
         return {
             "skus": [
@@ -600,7 +600,7 @@ def google_service_skus(self) -> dict[str, Any]:
             ]
         }
 
-    @pytest.fixture()
+    @pytest.fixture
     def collector_factory(
         self, cluster_holder: ClusterHolder, google_service_skus: dict[str, Any]
     ) -> Callable[..., AbstractContextManager[GCPNodePriceCollector]]:
@@ -690,7 +690,7 @@ async def test_get_latest_value_unknown_gpu(
 
 
 class TestAzureNodePriceCollector:
-    @pytest.fixture()
+    @pytest.fixture
     def prices_client_factory(
         self,
         aiohttp_client: Any,
@@ -709,7 +709,7 @@ async def get_prices(request: web.Request) -> web.Response:
 
         return _create
 
-    @pytest.fixture()
+    @pytest.fixture
     def collector_factory(self) -> Callable[..., AzureNodePriceCollector]:
         def _create(
             prices_client: aiohttp.ClientSession,
@@ -848,7 +848,7 @@ async def test_get_latest_spot_value(
 
 
 class TestPodCreditsCollector:
-    @pytest.fixture()
+    @pytest.fixture
     def cluster(self) -> Cluster:
         return Cluster(
             name="default",
@@ -871,7 +871,7 @@ def cluster(self) -> Cluster:
             ),
         )
 
-    @pytest.fixture()
+    @pytest.fixture
     def kube_client_factory(self) -> Callable[..., mock.AsyncMock]:
         def _create(pods: list[Pod]) -> mock.AsyncMock:
             async def get_pods(
@@ -890,7 +890,7 @@ async def get_pods(
 
         return _create
 
-    @pytest.fixture()
+    @pytest.fixture
     def collector_factory(
         self,
         cluster_holder: ClusterHolder,
@@ -1014,7 +1014,7 @@ async def test_get_latest_value__no_pods(
 
 
 class TestNodeEnergyConsumptionCollector:
-    @pytest.fixture()
+    @pytest.fixture
     def cluster(self) -> Cluster:
         return Cluster(
             name="default",