diff --git a/gql/transport/exceptions.py b/gql/transport/exceptions.py
index 48e9d96b..7ec27a33 100644
--- a/gql/transport/exceptions.py
+++ b/gql/transport/exceptions.py
@@ -23,7 +23,7 @@ class TransportServerError(TransportError):
     code: Optional[int]
 
     def __init__(self, message: str, code: Optional[int] = None):
-        super(TransportServerError, self).__init__(message)
+        super().__init__(message)
         self.code = code
 
 
diff --git a/gql/transport/phoenix_channel_websockets.py b/gql/transport/phoenix_channel_websockets.py
index b8226234..d5585807 100644
--- a/gql/transport/phoenix_channel_websockets.py
+++ b/gql/transport/phoenix_channel_websockets.py
@@ -52,7 +52,7 @@ def __init__(
         self.heartbeat_interval: float = heartbeat_interval
         self.heartbeat_task: Optional[asyncio.Future] = None
         self.subscriptions: Dict[str, Subscription] = {}
-        super(PhoenixChannelWebsocketsTransport, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
     async def _initialize(self) -> None:
         """Join the specified channel and wait for the connection ACK.
diff --git a/setup.py b/setup.py
index 21763a03..7ca66ae3 100644
--- a/setup.py
+++ b/setup.py
@@ -66,7 +66,7 @@
 # Get version from __version__.py file
 current_folder = os.path.abspath(os.path.dirname(__file__))
 about = {}
-with open(os.path.join(current_folder, "gql", "__version__.py"), "r") as f:
+with open(os.path.join(current_folder, "gql", "__version__.py")) as f:
     exec(f.read(), about)
 
 setup(
diff --git a/tests/fixtures/aws/fake_credentials.py b/tests/fixtures/aws/fake_credentials.py
index d8eac834..8df8b22b 100644
--- a/tests/fixtures/aws/fake_credentials.py
+++ b/tests/fixtures/aws/fake_credentials.py
@@ -1,7 +1,7 @@
 import pytest
 
 
-class FakeCredentials(object):
+class FakeCredentials:
     def __init__(
         self, access_key=None, secret_key=None, method=None, token=None, region=None
     ):
diff --git a/tests/fixtures/aws/fake_request.py b/tests/fixtures/aws/fake_request.py
index 615bc095..0c135d3a 100644
--- a/tests/fixtures/aws/fake_request.py
+++ b/tests/fixtures/aws/fake_request.py
@@ -1,7 +1,7 @@
 import pytest
 
 
-class FakeRequest(object):
+class FakeRequest:
     headers = None
 
     def __init__(self, request_props=None):
diff --git a/tests/fixtures/aws/fake_session.py b/tests/fixtures/aws/fake_session.py
index 78e1511a..585f5c59 100644
--- a/tests/fixtures/aws/fake_session.py
+++ b/tests/fixtures/aws/fake_session.py
@@ -1,7 +1,7 @@
 import pytest
 
 
-class FakeSession(object):
+class FakeSession:
     def __init__(self, credentials, region_name):
         self._credentials = credentials
         self._region_name = region_name
diff --git a/tests/fixtures/aws/fake_signer.py b/tests/fixtures/aws/fake_signer.py
index ff096745..c0177a32 100644
--- a/tests/fixtures/aws/fake_signer.py
+++ b/tests/fixtures/aws/fake_signer.py
@@ -11,7 +11,7 @@ def _fake_signer_factory(request=None):
     yield _fake_signer_factory
 
 
-class FakeSigner(object):
+class FakeSigner:
     def __init__(self, request=None) -> None:
         self.request = request
 
diff --git a/tests/test_client.py b/tests/test_client.py
index f7a3c947..1e794558 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -30,7 +30,7 @@ def http_transport_query():
 def test_request_transport_not_implemented(http_transport_query):
     class RandomTransport(Transport):
         def execute(self):
-            super(RandomTransport, self).execute(http_transport_query)
+            super().execute(http_transport_query)
 
     with pytest.raises(NotImplementedError) as exc_info:
         RandomTransport().execute()