diff --git a/ui_automator/ui_automator.py b/ui_automator/ui_automator.py
index 7666de3..5a551a7 100644
--- a/ui_automator/ui_automator.py
+++ b/ui_automator/ui_automator.py
@@ -61,7 +61,7 @@
 )
 
 
-def _validate_commssioning_arg(
+def _validate_commissioning_arg(
     device_name: str, pairing_code: str, gha_room: str
 ) -> None:
   """Returns None if commissioning values are valid.
@@ -243,7 +243,7 @@
     """
     self._logger.info('Start commissioning the device.')
 
-    _validate_commssioning_arg(device_name, pairing_code, gha_room)
+    _validate_commissioning_arg(device_name, pairing_code, gha_room)
 
     device_name_snake_case = f'_{inflection.underscore(device_name)}'
     matter_device = {
@@ -315,7 +315,7 @@
     ui_automator.decommission_device(_DECOMMISSION.value)
 
 
-# TODO(b/309745485): Type of argv should be Squence[str].
+# TODO(b/309745485): Type of argv should be Sequence[str].
 def _main(argv) -> None:
   if argv and len(argv) > 1:
     raise app.UsageError(f'Too many command-line arguments: {argv!r}')