diff --git a/py/selenium/types.py b/py/selenium/types.py
index 299aa64c48998..96d3830ba47ed 100644
--- a/py/selenium/types.py
+++ b/py/selenium/types.py
@@ -17,7 +17,8 @@
 
 """Selenium type definitions."""
 
-from typing import Union
+import typing
 
 
-AnyKey = Union[str, int, float]
+AnyKey = typing.Union[str, int, float]
+WaitExcTypes = typing.Iterable[typing.Type[Exception]]
diff --git a/py/selenium/webdriver/remote/command.py b/py/selenium/webdriver/remote/command.py
index 61458f8a66913..e705c58088c21 100644
--- a/py/selenium/webdriver/remote/command.py
+++ b/py/selenium/webdriver/remote/command.py
@@ -30,94 +30,94 @@ class Command:
 
     # Keep in sync with org.openqa.selenium.remote.DriverCommand
 
-    NEW_SESSION = "newSession"
-    DELETE_SESSION = "deleteSession"
-    NEW_WINDOW = "newWindow"
-    CLOSE = "close"
-    QUIT = "quit"
-    GET = "get"
-    GO_BACK = "goBack"
-    GO_FORWARD = "goForward"
-    REFRESH = "refresh"
-    ADD_COOKIE = "addCookie"
-    GET_COOKIE = "getCookie"
-    GET_ALL_COOKIES = "getCookies"
-    DELETE_COOKIE = "deleteCookie"
-    DELETE_ALL_COOKIES = "deleteAllCookies"
-    FIND_ELEMENT = "findElement"
-    FIND_ELEMENTS = "findElements"
-    FIND_CHILD_ELEMENT = "findChildElement"
-    FIND_CHILD_ELEMENTS = "findChildElements"
-    CLEAR_ELEMENT = "clearElement"
-    CLICK_ELEMENT = "clickElement"
-    SEND_KEYS_TO_ELEMENT = "sendKeysToElement"
-    UPLOAD_FILE = "uploadFile"
-    W3C_GET_CURRENT_WINDOW_HANDLE = "w3cGetCurrentWindowHandle"
-    W3C_GET_WINDOW_HANDLES = "w3cGetWindowHandles"
-    SET_WINDOW_RECT = "setWindowRect"
-    GET_WINDOW_RECT = "getWindowRect"
-    SWITCH_TO_WINDOW = "switchToWindow"
-    SWITCH_TO_FRAME = "switchToFrame"
-    SWITCH_TO_PARENT_FRAME = "switchToParentFrame"
-    W3C_GET_ACTIVE_ELEMENT = "w3cGetActiveElement"
-    GET_CURRENT_URL = "getCurrentUrl"
-    GET_PAGE_SOURCE = "getPageSource"
-    GET_TITLE = "getTitle"
-    W3C_EXECUTE_SCRIPT = "w3cExecuteScript"
-    W3C_EXECUTE_SCRIPT_ASYNC = "w3cExecuteScriptAsync"
-    GET_ELEMENT_TEXT = "getElementText"
-    GET_ELEMENT_TAG_NAME = "getElementTagName"
-    IS_ELEMENT_SELECTED = "isElementSelected"
-    IS_ELEMENT_ENABLED = "isElementEnabled"
-    GET_ELEMENT_RECT = "getElementRect"
-    GET_ELEMENT_ATTRIBUTE = "getElementAttribute"
-    GET_ELEMENT_PROPERTY = "getElementProperty"
-    GET_ELEMENT_VALUE_OF_CSS_PROPERTY = "getElementValueOfCssProperty"
-    GET_ELEMENT_ARIA_ROLE = "getElementAriaRole"
-    GET_ELEMENT_ARIA_LABEL = "getElementAriaLabel"
-    SCREENSHOT = "screenshot"
-    ELEMENT_SCREENSHOT = "elementScreenshot"
-    EXECUTE_ASYNC_SCRIPT = "executeAsyncScript"
-    SET_TIMEOUTS = "setTimeouts"
-    GET_TIMEOUTS = "getTimeouts"
-    W3C_MAXIMIZE_WINDOW = "w3cMaximizeWindow"
-    GET_LOG = "getLog"
-    GET_AVAILABLE_LOG_TYPES = "getAvailableLogTypes"
-    FULLSCREEN_WINDOW = "fullscreenWindow"
-    MINIMIZE_WINDOW = "minimizeWindow"
-    PRINT_PAGE = 'printPage'
+    NEW_SESSION: str = "newSession"
+    DELETE_SESSION: str = "deleteSession"
+    NEW_WINDOW: str = "newWindow"
+    CLOSE: str = "close"
+    QUIT: str = "quit"
+    GET: str = "get"
+    GO_BACK: str = "goBack"
+    GO_FORWARD: str = "goForward"
+    REFRESH: str = "refresh"
+    ADD_COOKIE: str = "addCookie"
+    GET_COOKIE: str = "getCookie"
+    GET_ALL_COOKIES: str = "getCookies"
+    DELETE_COOKIE: str = "deleteCookie"
+    DELETE_ALL_COOKIES: str = "deleteAllCookies"
+    FIND_ELEMENT: str = "findElement"
+    FIND_ELEMENTS: str = "findElements"
+    FIND_CHILD_ELEMENT: str = "findChildElement"
+    FIND_CHILD_ELEMENTS: str = "findChildElements"
+    CLEAR_ELEMENT: str = "clearElement"
+    CLICK_ELEMENT: str = "clickElement"
+    SEND_KEYS_TO_ELEMENT: str = "sendKeysToElement"
+    UPLOAD_FILE: str = "uploadFile"
+    W3C_GET_CURRENT_WINDOW_HANDLE: str = "w3cGetCurrentWindowHandle"
+    W3C_GET_WINDOW_HANDLES: str = "w3cGetWindowHandles"
+    SET_WINDOW_RECT: str = "setWindowRect"
+    GET_WINDOW_RECT: str = "getWindowRect"
+    SWITCH_TO_WINDOW: str = "switchToWindow"
+    SWITCH_TO_FRAME: str = "switchToFrame"
+    SWITCH_TO_PARENT_FRAME: str = "switchToParentFrame"
+    W3C_GET_ACTIVE_ELEMENT: str = "w3cGetActiveElement"
+    GET_CURRENT_URL: str = "getCurrentUrl"
+    GET_PAGE_SOURCE: str = "getPageSource"
+    GET_TITLE: str = "getTitle"
+    W3C_EXECUTE_SCRIPT: str = "w3cExecuteScript"
+    W3C_EXECUTE_SCRIPT_ASYNC: str = "w3cExecuteScriptAsync"
+    GET_ELEMENT_TEXT: str = "getElementText"
+    GET_ELEMENT_TAG_NAME: str = "getElementTagName"
+    IS_ELEMENT_SELECTED: str = "isElementSelected"
+    IS_ELEMENT_ENABLED: str = "isElementEnabled"
+    GET_ELEMENT_RECT: str = "getElementRect"
+    GET_ELEMENT_ATTRIBUTE: str = "getElementAttribute"
+    GET_ELEMENT_PROPERTY: str = "getElementProperty"
+    GET_ELEMENT_VALUE_OF_CSS_PROPERTY: str = "getElementValueOfCssProperty"
+    GET_ELEMENT_ARIA_ROLE: str = "getElementAriaRole"
+    GET_ELEMENT_ARIA_LABEL: str = "getElementAriaLabel"
+    SCREENSHOT: str = "screenshot"
+    ELEMENT_SCREENSHOT: str = "elementScreenshot"
+    EXECUTE_ASYNC_SCRIPT: str = "executeAsyncScript"
+    SET_TIMEOUTS: str = "setTimeouts"
+    GET_TIMEOUTS: str = "getTimeouts"
+    W3C_MAXIMIZE_WINDOW: str = "w3cMaximizeWindow"
+    GET_LOG: str = "getLog"
+    GET_AVAILABLE_LOG_TYPES: str = "getAvailableLogTypes"
+    FULLSCREEN_WINDOW: str = "fullscreenWindow"
+    MINIMIZE_WINDOW: str = "minimizeWindow"
+    PRINT_PAGE: str = "printPage"
 
     # Alerts
-    W3C_DISMISS_ALERT = "w3cDismissAlert"
-    W3C_ACCEPT_ALERT = "w3cAcceptAlert"
-    W3C_SET_ALERT_VALUE = "w3cSetAlertValue"
-    W3C_GET_ALERT_TEXT = "w3cGetAlertText"
+    W3C_DISMISS_ALERT: str = "w3cDismissAlert"
+    W3C_ACCEPT_ALERT: str = "w3cAcceptAlert"
+    W3C_SET_ALERT_VALUE: str = "w3cSetAlertValue"
+    W3C_GET_ALERT_TEXT: str = "w3cGetAlertText"
 
     # Advanced user interactions
-    W3C_ACTIONS = "actions"
-    W3C_CLEAR_ACTIONS = "clearActionState"
+    W3C_ACTIONS: str = "actions"
+    W3C_CLEAR_ACTIONS: str = "clearActionState"
 
     # Screen Orientation
-    SET_SCREEN_ORIENTATION = "setScreenOrientation"
-    GET_SCREEN_ORIENTATION = "getScreenOrientation"
+    SET_SCREEN_ORIENTATION: str = "setScreenOrientation"
+    GET_SCREEN_ORIENTATION: str = "getScreenOrientation"
 
     # Mobile
-    GET_NETWORK_CONNECTION = "getNetworkConnection"
-    SET_NETWORK_CONNECTION = "setNetworkConnection"
-    CURRENT_CONTEXT_HANDLE = "getCurrentContextHandle"
-    CONTEXT_HANDLES = "getContextHandles"
-    SWITCH_TO_CONTEXT = "switchToContext"
+    GET_NETWORK_CONNECTION: str = "getNetworkConnection"
+    SET_NETWORK_CONNECTION: str = "setNetworkConnection"
+    CURRENT_CONTEXT_HANDLE: str = "getCurrentContextHandle"
+    CONTEXT_HANDLES: str = "getContextHandles"
+    SWITCH_TO_CONTEXT: str = "switchToContext"
 
     # Web Components
-    GET_SHADOW_ROOT = "getShadowRoot"
-    FIND_ELEMENT_FROM_SHADOW_ROOT = "findElementFromShadowRoot"
-    FIND_ELEMENTS_FROM_SHADOW_ROOT = "findElementsFromShadowRoot"
+    GET_SHADOW_ROOT: str = "getShadowRoot"
+    FIND_ELEMENT_FROM_SHADOW_ROOT: str = "findElementFromShadowRoot"
+    FIND_ELEMENTS_FROM_SHADOW_ROOT: str = "findElementsFromShadowRoot"
 
     # Virtual Authenticator
-    ADD_VIRTUAL_AUTHENTICATOR = "addVirtualAuthenticator"
-    REMOVE_VIRTUAL_AUTHENTICATOR = "removeVirtualAuthenticator"
-    ADD_CREDENTIAL = "addCredential"
-    GET_CREDENTIALS = "getCredentials"
-    REMOVE_CREDENTIAL = "removeCredential"
-    REMOVE_ALL_CREDENTIALS = "removeAllCredentials"
-    SET_USER_VERIFIED = "setUserVerified"
+    ADD_VIRTUAL_AUTHENTICATOR: str = "addVirtualAuthenticator"
+    REMOVE_VIRTUAL_AUTHENTICATOR: str = "removeVirtualAuthenticator"
+    ADD_CREDENTIAL: str = "addCredential"
+    GET_CREDENTIALS: str = "getCredentials"
+    REMOVE_CREDENTIAL: str = "removeCredential"
+    REMOVE_ALL_CREDENTIALS: str = "removeAllCredentials"
+    SET_USER_VERIFIED: str = "setUserVerified"
diff --git a/py/selenium/webdriver/support/wait.py b/py/selenium/webdriver/support/wait.py
index 25639f412a1c9..4952d4c8575c8 100644
--- a/py/selenium/webdriver/support/wait.py
+++ b/py/selenium/webdriver/support/wait.py
@@ -16,15 +16,18 @@
 # under the License.
 
 import time
+import typing
+
+from selenium.types import WaitExcTypes
 from selenium.common.exceptions import NoSuchElementException
 from selenium.common.exceptions import TimeoutException
 
-POLL_FREQUENCY = 0.5  # How long to sleep in between calls to the method
-IGNORED_EXCEPTIONS = (NoSuchElementException,)  # exceptions ignored during calls to the method
+POLL_FREQUENCY: float = 0.5  # How long to sleep in between calls to the method
+IGNORED_EXCEPTIONS: typing.Tuple[typing.Type[Exception]] = (NoSuchElementException,)  # default to be ignored.
 
 
 class WebDriverWait:
-    def __init__(self, driver, timeout, poll_frequency=POLL_FREQUENCY, ignored_exceptions=None):
+    def __init__(self, driver, timeout: float, poll_frequency: float = POLL_FREQUENCY, ignored_exceptions: typing.Optional[WaitExcTypes] = None):
         """Constructor, takes a WebDriver instance and timeout in seconds.
 
            :Args:
@@ -60,7 +63,7 @@ def __repr__(self):
         return '<{0.__module__}.{0.__name__} (session="{1}")>'.format(
             type(self), self._driver.session_id)
 
-    def until(self, method, message=''):
+    def until(self, method, message: str = ""):
         """Calls the method provided with the driver as an argument until the \
         return value does not evaluate to ``False``.
 
@@ -86,7 +89,7 @@ def until(self, method, message=''):
                 break
         raise TimeoutException(message, screen, stacktrace)
 
-    def until_not(self, method, message=''):
+    def until_not(self, method, message: str = ""):
         """Calls the method provided with the driver as an argument until the \
         return value evaluates to ``False``.