diff --git a/.ruff.toml b/.ruff.toml
index 29cb7f79..32758896 100644
--- a/.ruff.toml
+++ b/.ruff.toml
@@ -5,18 +5,17 @@ select = [
     "F",   # pyflakes
     "E",   # pycodestyle errors
     "W",   # pycodestyle warnings
+    "A",  # flake8-builtins
     "B",   # flake8-bugbear
     "G",   # flake8-logging-format
     "PT",  # flake8-pytest-style
     "UP",  # pyupgrade
     "ERA", # eradicate
-    "RUF", # ruff
+    "RUF", # ruff-specific-rules
 ]
 
 ignore = [
-    "E501",   # line too long
-    
-    "B006",   # mutable-argument-default
+    "E501",   # line-too-long
+
     "F401",   # unused-import
-    "B010",   # set-attr-with-constant
 ]
diff --git a/tests/unit/cli/conftest.py b/tests/unit/cli/conftest.py
index 7c041bec..43a946b7 100644
--- a/tests/unit/cli/conftest.py
+++ b/tests/unit/cli/conftest.py
@@ -34,12 +34,8 @@
 import pytest
 
 import tests.utils.cli as test_files_module
-from powerapi.cli.binding_manager import PreProcessorBindingManager
 from powerapi.cli.config_parser import SubgroupConfigParser, BaseConfigParser, store_true, RootConfigParser
-from powerapi.cli.generator import PullerGenerator, PusherGenerator, PreProcessorGenerator
 from powerapi.cli.parsing_manager import RootConfigParsingManager, SubgroupConfigParsingManager
-from powerapi.dispatcher import DispatcherActor, RouteTable
-from powerapi.filter import BroadcastReportFilter
 from tests.utils.cli.base_config_parser import load_configuration_from_json_file, generate_cli_configuration_from_json_file