diff --git a/lib/rucio/common/plugins.py b/lib/rucio/common/plugins.py
index e3a5c54146..a0a804da07 100644
--- a/lib/rucio/common/plugins.py
+++ b/lib/rucio/common/plugins.py
@@ -23,7 +23,7 @@
 PolicyPackageAlgorithmsT = TypeVar('PolicyPackageAlgorithmsT', bound='PolicyPackageAlgorithms')
 
 
-class PolicyPackageAlgorithms():
+class PolicyPackageAlgorithms:
     """
     Base class for Rucio Policy Package Algorithms
 
diff --git a/lib/rucio/core/rse_selector.py b/lib/rucio/core/rse_selector.py
index 7c320e90d7..a1e98446d6 100644
--- a/lib/rucio/core/rse_selector.py
+++ b/lib/rucio/core/rse_selector.py
@@ -27,7 +27,7 @@
     from sqlalchemy.orm import Session
 
 
-class RSESelector():
+class RSESelector:
     """
     Representation of the RSE selector
     """
diff --git a/lib/rucio/daemons/c3po/collectors/jedi_did.py b/lib/rucio/daemons/c3po/collectors/jedi_did.py
index cf1a861d2c..51a4fbfd97 100644
--- a/lib/rucio/daemons/c3po/collectors/jedi_did.py
+++ b/lib/rucio/daemons/c3po/collectors/jedi_did.py
@@ -17,7 +17,7 @@
 from rucio.db.sqla.session import read_session
 
 
-class JediDIDCollector():
+class JediDIDCollector:
     def __init__(self, queue):
         self.queue = queue
         self.max_tid = 0
diff --git a/tests/test_abacus_account.py b/tests/test_abacus_account.py
index 3d2cebcca2..7569f26993 100644
--- a/tests/test_abacus_account.py
+++ b/tests/test_abacus_account.py
@@ -26,7 +26,7 @@
 
 
 @pytest.mark.noparallel(reason='uses daemon, failing in parallel to other tests, updates account')
-class TestAbacusAccount2():
+class TestAbacusAccount2:
 
     def test_abacus_account(self, vo, root_account, mock_scope, rse_factory, did_factory, rucio_client):
         """ ABACUS (ACCOUNT): Test update of account usage """
diff --git a/tests/test_abacus_collection_replica.py b/tests/test_abacus_collection_replica.py
index 7e60984c9a..e117f1dd56 100644
--- a/tests/test_abacus_collection_replica.py
+++ b/tests/test_abacus_collection_replica.py
@@ -28,7 +28,7 @@
 
 
 @pytest.mark.noparallel(reason='uses daemons, fails when run in parallel')
-class TestAbacusCollectionReplica():
+class TestAbacusCollectionReplica:
 
     def test_abacus_collection_replica_cleanup(self, vo, mock_scope, rse_factory, did_client, jdoe_account):
         """ ABACUS (COLLECTION REPLICA): Test if the cleanup procedure works correctly. """
diff --git a/tests/test_abacus_rse.py b/tests/test_abacus_rse.py
index 0836db2730..b5a63f0194 100644
--- a/tests/test_abacus_rse.py
+++ b/tests/test_abacus_rse.py
@@ -23,7 +23,7 @@
 
 
 @pytest.mark.noparallel(reason='uses daemon, failing in parallel to other tests')
-class TestAbacusRSE():
+class TestAbacusRSE:
 
     def test_abacus_rse(self, vo, mock_scope, rse_factory, did_factory, rucio_client):
         """ ABACUS (RSE): Test update of RSE usage. """
diff --git a/tests/test_auditor.py b/tests/test_auditor.py
index 9c751a5721..4bd7b05644 100644
--- a/tests/test_auditor.py
+++ b/tests/test_auditor.py
@@ -106,7 +106,7 @@ def test_auditor_check_survives_failures_and_queues_failed_rses(mock_auditor):
         lambda: None,
     )
 
-    class MockMultiProcessing():
+    class MockMultiProcessing:
         def is_set(self):
             return queue.empty()
     terminate = MockMultiProcessing()
diff --git a/tests/test_module_import.py b/tests/test_module_import.py
index c78d1d722e..8094f636fd 100644
--- a/tests/test_module_import.py
+++ b/tests/test_module_import.py
@@ -15,7 +15,7 @@
 from rucio.common.utils import execute
 
 
-class TestModuleImport():
+class TestModuleImport:
     def test_import(self):
         """ """
         cmd = 'rucio --version'
diff --git a/tools/monitoring/extract.py b/tools/monitoring/extract.py
index 3de2ad8aaa..2cfdefec0e 100644
--- a/tools/monitoring/extract.py
+++ b/tools/monitoring/extract.py
@@ -28,7 +28,7 @@
 import stomp
 
 
-class ElasticConn():
+class ElasticConn:
   def __init__(self, host_port, auth):
     self.__es = es.Elasticsearch([host_port[0]],http_auth=auth,consumer_port=host_port[1])