diff --git a/appium/saucetestcase.py b/appium/saucetestcase.py
index a2e94aba..754146fb 100644
--- a/appium/saucetestcase.py
+++ b/appium/saucetestcase.py
@@ -19,7 +19,7 @@
 import os
 import sys
 import unittest
-from typing import Any, Callable, List
+from typing import Callable, List
 
 from sauceclient import SauceClient
 
diff --git a/appium/webdriver/appium_service.py b/appium/webdriver/appium_service.py
index 7683782a..d2aedadb 100644
--- a/appium/webdriver/appium_service.py
+++ b/appium/webdriver/appium_service.py
@@ -50,8 +50,7 @@ def poll_url(host: str, port: int, path: str, timeout_ms: int) -> bool:
     while time.time() < time_started_sec + timeout_ms / 1000.0:
         try:
             conn = urllib3.PoolManager(timeout=1.0)
-            resp = conn.request('HEAD', 'http://{host}:{port}{path}'.format(
-                host=host, port=port, path=path))
+            resp = conn.request('HEAD', f'http://{host}:{port}{path}')
             if resp.status < 400:
                 return True
         except Exception:
@@ -67,7 +66,7 @@ class AppiumServiceError(RuntimeError):
 T = TypeVar('T', bound='AppiumService')
 
 
-class AppiumService(object):
+class AppiumService:
     def __init__(self) -> None:
         self._process: Optional[sp.Popen] = None
         self._cmd: Optional[List] = None
@@ -169,13 +168,12 @@ def start(self, **kwargs: Any) -> sp.Popen:
         port = self._parse_port(args)
         error_msg: Optional[str] = None
         if not self.is_running or (timeout_ms > 0 and not poll_url(host, port, STATUS_URL, timeout_ms)):
-            error_msg = 'Appium has failed to start on {}:{} within {}ms timeout'\
-                        .format(host, port, timeout_ms)
+            error_msg = f'Appium has failed to start on {host}:{port} within {timeout_ms}ms timeout'
         if error_msg is not None:
             if stderr == sp.PIPE:
                 err_output = self._process.stderr.read()
                 if err_output:
-                    error_msg += '\nOriginal error: {}'.format(str(err_output))
+                    error_msg += f'\nOriginal error: {str(err_output)}'
             self.stop()
             raise AppiumServiceError(error_msg)
         return self._process
diff --git a/appium/webdriver/applicationstate.py b/appium/webdriver/applicationstate.py
index e3c255ae..0658b264 100644
--- a/appium/webdriver/applicationstate.py
+++ b/appium/webdriver/applicationstate.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 
-class ApplicationState(object):
+class ApplicationState:
     NOT_INSTALLED = 0
     NOT_RUNNING = 1
     RUNNING_IN_BACKGROUND_SUSPENDED = 2
diff --git a/appium/webdriver/clipboard_content_type.py b/appium/webdriver/clipboard_content_type.py
index 67aac351..7c1211b3 100644
--- a/appium/webdriver/clipboard_content_type.py
+++ b/appium/webdriver/clipboard_content_type.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 
-class ClipboardContentType(object):
+class ClipboardContentType:
     PLAINTEXT = 'plaintext'
     IMAGE = 'image'
     URL = 'url'
diff --git a/appium/webdriver/common/multi_action.py b/appium/webdriver/common/multi_action.py
index f3326534..e6a84cfe 100644
--- a/appium/webdriver/common/multi_action.py
+++ b/appium/webdriver/common/multi_action.py
@@ -31,7 +31,7 @@
 T = TypeVar('T', bound='MultiAction')
 
 
-class MultiAction(object):
+class MultiAction:
     def __init__(self, driver: 'WebDriver', element: Optional['WebElement'] = None) -> None:
         self._driver = driver
         self._element = element
diff --git a/appium/webdriver/common/touch_action.py b/appium/webdriver/common/touch_action.py
index a8fb299d..a9544063 100644
--- a/appium/webdriver/common/touch_action.py
+++ b/appium/webdriver/common/touch_action.py
@@ -35,7 +35,7 @@
 T = TypeVar('T', bound='TouchAction')
 
 
-class TouchAction(object):
+class TouchAction:
 
     def __init__(self, driver: Optional['WebDriver'] = None):
         self._driver = driver
diff --git a/appium/webdriver/connectiontype.py b/appium/webdriver/connectiontype.py
index 5a408ba5..7d477680 100644
--- a/appium/webdriver/connectiontype.py
+++ b/appium/webdriver/connectiontype.py
@@ -26,7 +26,7 @@
 """
 
 
-class ConnectionType(object):
+class ConnectionType:
     NO_CONNECTION = 0
     AIRPLANE_MODE = 1
     WIFI_ONLY = 2
diff --git a/appium/webdriver/extensions/android/display.py b/appium/webdriver/extensions/android/display.py
index 73ac1ccb..f07c0875 100644
--- a/appium/webdriver/extensions/android/display.py
+++ b/appium/webdriver/extensions/android/display.py
@@ -12,8 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import TypeVar
-
 from selenium import webdriver
 
 from appium.webdriver.mobilecommand import MobileCommand as Command
diff --git a/appium/webdriver/extensions/android/gsm.py b/appium/webdriver/extensions/android/gsm.py
index df4ea95e..325ff573 100644
--- a/appium/webdriver/extensions/android/gsm.py
+++ b/appium/webdriver/extensions/android/gsm.py
@@ -21,14 +21,14 @@
 from appium.webdriver.mobilecommand import MobileCommand as Command
 
 
-class GsmCallActions(object):
+class GsmCallActions:
     CALL = 'call'
     ACCEPT = 'accept'
     CANCEL = 'cancel'
     HOLD = 'hold'
 
 
-class GsmSignalStrength(object):
+class GsmSignalStrength:
     NONE_OR_UNKNOWN = 0
     POOR = 1
     MODERATE = 2
@@ -36,7 +36,7 @@ class GsmSignalStrength(object):
     GREAT = 4
 
 
-class GsmVoiceState(object):
+class GsmVoiceState:
     UNREGISTERED = 'unregistered'
     HOME = 'home'
     ROAMING = 'roaming'
@@ -66,8 +66,8 @@ def make_gsm_call(self, phone_number: str, action: str) -> T:
         """
         constants = extract_const_attributes(GsmCallActions)
         if action not in constants.values():
-            logger.warning('{} is unknown. Consider using one of {} constants. (e.g. {}.CALL)'.format(
-                action, list(constants.keys()), GsmCallActions.__name__))
+            logger.warning(
+                f'{action} is unknown. Consider using one of {list(constants.keys())} constants. (e.g. {GsmCallActions.__name__}.CALL)')
         self.execute(Command.MAKE_GSM_CALL, {'phoneNumber': phone_number, 'action': action})
         return self
 
@@ -85,8 +85,8 @@ def set_gsm_signal(self, strength: int) -> T:
         """
         constants = extract_const_attributes(GsmSignalStrength)
         if strength not in constants.values():
-            logger.warning('{} is out of range. Consider using one of {} constants. (e.g. {}.GOOD)'.format(
-                strength, list(constants.keys()), GsmSignalStrength.__name__))
+            logger.warning(
+                f'{strength} is out of range. Consider using one of {list(constants.keys())} constants. (e.g. {GsmSignalStrength.__name__}.GOOD)')
         self.execute(Command.SET_GSM_SIGNAL, {'signalStrength': strength, 'signalStrengh': strength})
         return self
 
@@ -104,8 +104,8 @@ def set_gsm_voice(self, state: str) -> T:
         """
         constants = extract_const_attributes(GsmVoiceState)
         if state not in constants.values():
-            logger.warning('{} is unknown. Consider using one of {} constants. (e.g. {}.HOME)'.format(
-                state, list(constants.keys()), GsmVoiceState.__name__))
+            logger.warning(
+                f'{state} is unknown. Consider using one of {list(constants.keys())} constants. (e.g. {GsmVoiceState.__name__}.HOME)')
         self.execute(Command.SET_GSM_VOICE, {'state': state})
         return self
 
diff --git a/appium/webdriver/extensions/android/network.py b/appium/webdriver/extensions/android/network.py
index 99c71763..4f874687 100644
--- a/appium/webdriver/extensions/android/network.py
+++ b/appium/webdriver/extensions/android/network.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import Any, TypeVar
+from typing import TypeVar
 
 from selenium import webdriver
 
@@ -23,7 +23,7 @@
 T = TypeVar('T', bound='Network')
 
 
-class NetSpeed(object):
+class NetSpeed:
     GSM = 'gsm'  # GSM/CSD (up: 14.4(kbps), down: 14.4(kbps))
     SCSD = 'scsd'  # HSCSD (up: 14.4, down: 57.6)
     GPRS = 'gprs'  # GPRS (up: 28.8, down: 57.6)
@@ -98,8 +98,8 @@ def set_network_speed(self, speed_type: str) -> T:
         """
         constants = extract_const_attributes(NetSpeed)
         if speed_type not in constants.values():
-            logger.warning('{} is unknown. Consider using one of {} constants. (e.g. {}.LTE)'.format(
-                speed_type, list(constants.keys()), NetSpeed.__name__))
+            logger.warning(
+                f'{speed_type} is unknown. Consider using one of {list(constants.keys())} constants. (e.g. {NetSpeed.__name__}.LTE)')
 
         self.execute(Command.SET_NETWORK_SPEED, {'netspeed': speed_type})
         return self
diff --git a/appium/webdriver/extensions/clipboard.py b/appium/webdriver/extensions/clipboard.py
index e4f7bc71..02e3f522 100644
--- a/appium/webdriver/extensions/clipboard.py
+++ b/appium/webdriver/extensions/clipboard.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import base64
-from typing import Any, Dict, Optional, TypeVar
+from typing import Optional, TypeVar
 
 from selenium import webdriver
 
diff --git a/appium/webdriver/extensions/execute_driver.py b/appium/webdriver/extensions/execute_driver.py
index f6c00fb0..3b3778c3 100644
--- a/appium/webdriver/extensions/execute_driver.py
+++ b/appium/webdriver/extensions/execute_driver.py
@@ -44,7 +44,7 @@ def execute_driver(self, script: str, script_type: str = 'webdriverio', timeout_
             WebDriverException: If something error happenes in the script. The message has the original error message.
         """
 
-        class Result(object):
+        class Result:
 
             def __init__(self, response: Dict):
                 self.result = response['result']
diff --git a/appium/webdriver/extensions/location.py b/appium/webdriver/extensions/location.py
index 054cf44e..4af21de9 100644
--- a/appium/webdriver/extensions/location.py
+++ b/appium/webdriver/extensions/location.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import Dict, Optional, TypeVar, Union
+from typing import Dict, TypeVar, Union
 
 from selenium import webdriver
 
diff --git a/appium/webdriver/extensions/remote_fs.py b/appium/webdriver/extensions/remote_fs.py
index dd256a7a..4f8ff871 100644
--- a/appium/webdriver/extensions/remote_fs.py
+++ b/appium/webdriver/extensions/remote_fs.py
@@ -74,7 +74,7 @@ def push_file(self, destination_path: str,
                 with open(source_path, 'rb') as f:
                     file_data = f.read()
             except IOError:
-                message = 'source_path {} could not be found. Are you sure the file exists?'.format(source_path)
+                message = f'source_path "{source_path}" could not be found. Are you sure the file exists?'
                 raise InvalidArgumentException(message)
             base64data = base64.b64encode(file_data).decode('utf-8')
 
diff --git a/appium/webdriver/extensions/search_context/base_search_context.py b/appium/webdriver/extensions/search_context/base_search_context.py
index 404aa62a..317069f0 100644
--- a/appium/webdriver/extensions/search_context/base_search_context.py
+++ b/appium/webdriver/extensions/search_context/base_search_context.py
@@ -14,13 +14,13 @@
 
 # pylint: disable=abstract-method
 
-from typing import TYPE_CHECKING, Dict, List, Optional, Union
+from typing import TYPE_CHECKING, Dict, List, Union
 
 if TYPE_CHECKING:
     from appium.webdriver.webelement import WebElement
 
 
-class BaseSearchContext(object):
+class BaseSearchContext:
     """Used by each search context. Dummy find_element/s are for preventing pylint error"""
 
     def find_element(self, by: str, value: Union[str, Dict] = None) -> 'WebElement':
diff --git a/appium/webdriver/mobilecommand.py b/appium/webdriver/mobilecommand.py
index f6d90679..b0bd8c4d 100644
--- a/appium/webdriver/mobilecommand.py
+++ b/appium/webdriver/mobilecommand.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 
-class MobileCommand(object):
+class MobileCommand:
     # Common
     GET_SESSION = 'getSession'
     GET_ALL_SESSIONS = 'getAllSessions'
diff --git a/appium/webdriver/webdriver.py b/appium/webdriver/webdriver.py
index 13e9619f..3a0512bc 100644
--- a/appium/webdriver/webdriver.py
+++ b/appium/webdriver/webdriver.py
@@ -193,12 +193,7 @@ def _update_command_executor(self, keep_alive: bool) -> None:
         hostname = self.capabilities[direct_host]
         port = self.capabilities[direct_port]
         path = self.capabilities[direct_path]
-        executor = '{scheme}://{hostname}:{port}{path}'.format(
-            scheme=protocol,
-            hostname=hostname,
-            port=port,
-            path=path
-        )
+        executor = f'{protocol}://{hostname}:{port}{path}'
 
         logger.info('Updated request endpoint to %s', executor)
         # Override command executor
diff --git a/test/functional/android/common_tests.py b/test/functional/android/common_tests.py
index cf5ea791..04fb63e8 100644
--- a/test/functional/android/common_tests.py
+++ b/test/functional/android/common_tests.py
@@ -44,7 +44,7 @@ def test_open_notifications(self):
             self.skipTest('Need to fix flaky test during running on CI.')
         for word in ['App', 'Notification', 'Status Bar', ':-|']:
             wait_for_element(self.driver, MobileBy.ANDROID_UIAUTOMATOR,
-                             'new UiSelector().text("{}")'.format(word)).click()
+                             f'new UiSelector().text("{word}")').click()
 
         self.driver.open_notifications()
         sleep(1)
diff --git a/test/functional/android/ime_tests.py b/test/functional/android/ime_tests.py
index 86bf7449..6cac0e73 100644
--- a/test/functional/android/ime_tests.py
+++ b/test/functional/android/ime_tests.py
@@ -37,7 +37,6 @@ def test_active_ime_engine(self):
 
     def test_activate_ime_engine(self):
         engines = self.driver.available_ime_engines
-        active_engine = self.driver.active_ime_engine
 
         self.driver.activate_ime_engine(engines[-1])
         self.assertEqual(self.driver.active_ime_engine, engines[-1])
diff --git a/test/functional/android/log_event_tests.py b/test/functional/android/log_event_tests.py
index 8067e9f7..a64ff9a0 100644
--- a/test/functional/android/log_event_tests.py
+++ b/test/functional/android/log_event_tests.py
@@ -23,7 +23,7 @@ def test_log_event(self):
         vendor = 'appium'
         event = 'funEvent'
         self.driver.log_event(vendor, event)
-        assert '{}:{}'.format(vendor, event) in self.driver.get_events().keys()
+        assert f'{vendor}:{event}' in self.driver.get_events().keys()
 
 
 if __name__ == '__main__':
diff --git a/test/functional/android/webelement_tests.py b/test/functional/android/webelement_tests.py
index 1a16473b..b936ffc4 100644
--- a/test/functional/android/webelement_tests.py
+++ b/test/functional/android/webelement_tests.py
@@ -47,7 +47,7 @@ def test_set_text(self):
     def test_send_keys(self):
         for text in ['App', 'Activity', 'Custom Title']:
             wait_for_element(self.driver, MobileBy.XPATH,
-                             "//android.widget.TextView[@text='{}']".format(text)).click()
+                             f"//android.widget.TextView[@text='{text}']").click()
 
         el = wait_for_element(self.driver, MobileBy.ID, '{}:id/left_text_edit'.format(APIDEMO_PKG_NAME))
         el.send_keys(' text')
diff --git a/test/functional/ios/helper/desired_capabilities.py b/test/functional/ios/helper/desired_capabilities.py
index 7a98f61a..12dc982a 100644
--- a/test/functional/ios/helper/desired_capabilities.py
+++ b/test/functional/ios/helper/desired_capabilities.py
@@ -41,7 +41,7 @@ def get_desired_capabilities(app=None):
     return desired_caps
 
 
-class PytestXdistWorker(object):
+class PytestXdistWorker:
     NUMBER = os.getenv('PYTEST_XDIST_WORKER')
     COUNT = os.getenv('PYTEST_XDIST_WORKER_COUNT')  # Return 2 if `-n 2` is passed
 
@@ -53,7 +53,7 @@ def gw(number):
         if number >= PytestXdistWorker.COUNT:
             return 'gw0'
 
-        return 'gw{}'.format(number)
+        return f'gw{number}'
 
 # If you run tests with pytest-xdist, you can run tests in parallel.
 
diff --git a/test/functional/ios/webdriver_tests.py b/test/functional/ios/webdriver_tests.py
index 51c7bc58..3d0f113f 100644
--- a/test/functional/ios/webdriver_tests.py
+++ b/test/functional/ios/webdriver_tests.py
@@ -36,7 +36,7 @@ def test_all_sessions(self):
         desired_caps['deviceName'] = 'iPhone Xs Max'
         desired_caps['wdaLocalPort'] = port
 
-        class session_counts_is_two(object):
+        class session_counts_is_two:
             TIMEOUT = 10
 
             def __call__(self, driver):
diff --git a/test/functional/test_helper.py b/test/functional/test_helper.py
index a531d053..ee6b6daf 100644
--- a/test/functional/test_helper.py
+++ b/test/functional/test_helper.py
@@ -20,8 +20,7 @@ def get_available_from_port_range(from_port, to_port):
         finally:
             sock.close()
 
-    raise NoAvailablePortError('No available port between {} and {}'.format(
-        from_port, to_port))
+    raise NoAvailablePortError(f'No available port between {from_port} and {to_port}')
 
 
 def is_ci():
diff --git a/test/unit/helper/test_helper.py b/test/unit/helper/test_helper.py
index f7ff3ca0..4c1b2d07 100644
--- a/test/unit/helper/test_helper.py
+++ b/test/unit/helper/test_helper.py
@@ -28,7 +28,7 @@ def appium_command(command):
     Returns:
         str: A string of command URL
     """
-    return '{}{}'.format(SERVER_URL_BASE, command)
+    return f'{SERVER_URL_BASE}{command}'
 
 
 def android_w3c_driver():