diff --git a/tests/test_agent.py b/tests/test_agent.py
index d39d8c9..7603a8c 100644
--- a/tests/test_agent.py
+++ b/tests/test_agent.py
@@ -209,7 +209,7 @@ async def port_forward(self, ready_event, proxy, target, local_port):
             del self.port_forwards[local_port]
 
 
-@pytest.fixture()
+@pytest.fixture
 async def agent_io():
     io = FakeAgentIO()
     async with agentmodule.Agent(HUB_URL, io, None) as agent:
diff --git a/tests/test_auth.py b/tests/test_auth.py
index 3f560c5..f8600db 100644
--- a/tests/test_auth.py
+++ b/tests/test_auth.py
@@ -179,12 +179,12 @@ async def send(self, data):
         await self._send(data)
 
 
-@pytest.fixture()
+@pytest.fixture
 def http_client():
     return FakeHttpClient()
 
 
-@pytest.fixture()
+@pytest.fixture
 def hub(http_client):
     config = {
         "auth": {
@@ -201,7 +201,7 @@ def hub(http_client):
     return hubmodule.Hub(config, http_client)
 
 
-@pytest.fixture()
+@pytest.fixture
 def token_store_path():
     path = pathlib.Path(__file__).parent / "auth_tokens.json"
     path.unlink(missing_ok=True)
@@ -352,7 +352,7 @@ async def test_permission_lost(hub, http_client, token_store_path, fake_time):
     assert "Permission lost" in str(execinfo.value)
 
 
-@pytest.fixture()
+@pytest.fixture
 def fake_time(monkeypatch):
     fake_time_ = FakeTime()
     fake_datetime = fake_time_.fake_datetime()
diff --git a/tests/test_http.py b/tests/test_http.py
index 2d2bca8..6f5db47 100644
--- a/tests/test_http.py
+++ b/tests/test_http.py
@@ -179,7 +179,7 @@ async def get_written(self):
         return await self._queue.get()
 
 
-@pytest.fixture()
+@pytest.fixture
 def fake_server(monkeypatch):
     fake_server_ = FakeServer()
     monkeypatch.setattr(util, "connect", fake_server_.connect)
@@ -256,7 +256,7 @@ def _send(self, conn, events):
         self._reader.feed(data)
 
 
-@pytest.fixture()
+@pytest.fixture
 def fake_time(monkeypatch):
     fake_time_ = FakeTime()
     fake_datetime = fake_time_.fake_datetime()
@@ -284,7 +284,7 @@ def add_time(self, time):
         self._now += time
 
 
-@pytest.fixture()
+@pytest.fixture
 def http_client():
     return http.Client(proxies={})
 
diff --git a/tests/test_hub.py b/tests/test_hub.py
index 8a41f38..fe75332 100644
--- a/tests/test_hub.py
+++ b/tests/test_hub.py
@@ -13,7 +13,7 @@
 DEFAULT_AGENT_IP = "6.1.1.1"
 
 
-@pytest.fixture()
+@pytest.fixture
 def hub():
     return hubmodule.Hub()
 
diff --git a/tests/test_jsonrpc.py b/tests/test_jsonrpc.py
index 63d51d0..0ebabb1 100644
--- a/tests/test_jsonrpc.py
+++ b/tests/test_jsonrpc.py
@@ -73,7 +73,7 @@ def is_empty(self):
 Fakes = collections.namedtuple("Fakes", ["channel", "api", "transport"])
 
 
-@pytest.fixture()
+@pytest.fixture
 async def fakes():
     transport = FakeTransport()
     api = FakeApi()