diff --git a/homeassistant/components/alarm_control_panel/concord232.py b/homeassistant/components/alarm_control_panel/concord232.py
index df815424ee9e..291d4bc80b59 100755
--- a/homeassistant/components/alarm_control_panel/concord232.py
+++ b/homeassistant/components/alarm_control_panel/concord232.py
@@ -107,7 +107,7 @@ class Concord232Alarm(alarm.AlarmControlPanel):
             newstate = STATE_ALARM_ARMED_AWAY
 
         if not newstate == self._state:
-            _LOGGER.info("State Chnage from %s to %s", self._state, newstate)
+            _LOGGER.info("State Change from %s to %s", self._state, newstate)
             self._state = newstate
         return self._state
 
diff --git a/homeassistant/components/alexa/smart_home.py b/homeassistant/components/alexa/smart_home.py
index aa4b1cbec70e..ae1ecb87f60d 100644
--- a/homeassistant/components/alexa/smart_home.py
+++ b/homeassistant/components/alexa/smart_home.py
@@ -43,7 +43,7 @@ def mapping_api_function(name):
 
 @asyncio.coroutine
 def async_handle_message(hass, message):
-    """Handle incomming API messages."""
+    """Handle incoming API messages."""
     assert int(message[ATTR_HEADER][ATTR_PAYLOAD_VERSION]) == 2
 
     # Do we support this API request?
@@ -57,7 +57,7 @@ def async_handle_message(hass, message):
 
 
 def api_message(name, namespace, payload=None):
-    """Create a API formated response message.
+    """Create a API formatted response message.
 
     Async friendly.
     """
@@ -74,7 +74,7 @@ def api_message(name, namespace, payload=None):
 
 
 def api_error(request, exc='DriverInternalError'):
-    """Create a API formated error response.
+    """Create a API formatted error response.
 
     Async friendly.
     """
@@ -83,7 +83,7 @@ def api_error(request, exc='DriverInternalError'):
 
 @asyncio.coroutine
 def async_api_discovery(hass, request):
-    """Create a API formated discovery response.
+    """Create a API formatted discovery response.
 
     Async friendly.
     """
diff --git a/homeassistant/components/binary_sensor/insteon_plm.py b/homeassistant/components/binary_sensor/insteon_plm.py
index 448ceae8636c..0702ce8bb9e0 100644
--- a/homeassistant/components/binary_sensor/insteon_plm.py
+++ b/homeassistant/components/binary_sensor/insteon_plm.py
@@ -55,12 +55,12 @@ class InsteonPLMBinarySensorDevice(BinarySensorDevice):
 
     @property
     def address(self):
-        """Return the the address of the node."""
+        """Return the address of the node."""
         return self._address
 
     @property
     def name(self):
-        """Return the the name of the node."""
+        """Return the name of the node."""
         return self._name
 
     @property
diff --git a/homeassistant/components/calendar/todoist.py b/homeassistant/components/calendar/todoist.py
index ae9a1c9afa85..eb9f0a2677e2 100644
--- a/homeassistant/components/calendar/todoist.py
+++ b/homeassistant/components/calendar/todoist.py
@@ -277,7 +277,7 @@ class TodoistProjectData(object):
     """
     Class used by the Task Device service object to hold all Todoist Tasks.
 
-    This is analagous to the GoogleCalendarData found in the Google Calendar
+    This is analogous to the GoogleCalendarData found in the Google Calendar
     component.
 
     Takes an object with a 'name' field and optionally an 'id' field (either
diff --git a/homeassistant/components/camera/amcrest.py b/homeassistant/components/camera/amcrest.py
index 51b8ff13906f..aba1bb08c936 100644
--- a/homeassistant/components/camera/amcrest.py
+++ b/homeassistant/components/camera/amcrest.py
@@ -62,7 +62,7 @@ class AmcrestCam(Camera):
         self._token = self._auth = authentication
 
     def camera_image(self):
-        """Return a still image reponse from the camera."""
+        """Return a still image response from the camera."""
         # Send the request to snap a picture and return raw jpg data
         response = self._camera.snapshot(channel=self._resolution)
         return response.data
diff --git a/homeassistant/components/camera/blink.py b/homeassistant/components/camera/blink.py
index bca4fafec4fa..4b708817cfd9 100644
--- a/homeassistant/components/camera/blink.py
+++ b/homeassistant/components/camera/blink.py
@@ -76,6 +76,6 @@ class BlinkCamera(Camera):
         return self.data.camera_thumbs[self._name]
 
     def camera_image(self):
-        """Return a still image reponse from the camera."""
+        """Return a still image response from the camera."""
         self.request_image()
         return self.response.content
diff --git a/homeassistant/components/camera/foscam.py b/homeassistant/components/camera/foscam.py
index 3f2761e332a5..3cc391eae33f 100644
--- a/homeassistant/components/camera/foscam.py
+++ b/homeassistant/components/camera/foscam.py
@@ -59,7 +59,7 @@ class FoscamCam(Camera):
                                             self._password, verbose=False)
 
     def camera_image(self):
-        """Return a still image reponse from the camera."""
+        """Return a still image response from the camera."""
         # Send the request to snap a picture and return raw jpg data
         # Handle exception if host is not reachable or url failed
         result, response = self._foscam_session.snap_picture_2()
diff --git a/homeassistant/components/climate/__init__.py b/homeassistant/components/climate/__init__.py
index 1f9193012549..8ccc3b2d6631 100644
--- a/homeassistant/components/climate/__init__.py
+++ b/homeassistant/components/climate/__init__.py
@@ -147,7 +147,7 @@ def set_hold_mode(hass, hold_mode, entity_id=None):
 
 @bind_hass
 def set_aux_heat(hass, aux_heat, entity_id=None):
-    """Turn all or specified climate devices auxillary heater on."""
+    """Turn all or specified climate devices auxiliary heater on."""
     data = {
         ATTR_AUX_HEAT: aux_heat
     }
@@ -661,22 +661,22 @@ class ClimateDevice(Entity):
         return self.hass.async_add_job(self.set_hold_mode, hold_mode)
 
     def turn_aux_heat_on(self):
-        """Turn auxillary heater on."""
+        """Turn auxiliary heater on."""
         raise NotImplementedError()
 
     def async_turn_aux_heat_on(self):
-        """Turn auxillary heater on.
+        """Turn auxiliary heater on.
 
         This method must be run in the event loop and returns a coroutine.
         """
         return self.hass.async_add_job(self.turn_aux_heat_on)
 
     def turn_aux_heat_off(self):
-        """Turn auxillary heater off."""
+        """Turn auxiliary heater off."""
         raise NotImplementedError()
 
     def async_turn_aux_heat_off(self):
-        """Turn auxillary heater off.
+        """Turn auxiliary heater off.
 
         This method must be run in the event loop and returns a coroutine.
         """
diff --git a/homeassistant/components/climate/demo.py b/homeassistant/components/climate/demo.py
index 24b40af7eb1f..0880cb3db8f7 100644
--- a/homeassistant/components/climate/demo.py
+++ b/homeassistant/components/climate/demo.py
@@ -183,11 +183,11 @@ class DemoClimate(ClimateDevice):
         self.schedule_update_ha_state()
 
     def turn_aux_heat_on(self):
-        """Turn away auxillary heater on."""
+        """Turn away auxiliary heater on."""
         self._aux = True
         self.schedule_update_ha_state()
 
     def turn_aux_heat_off(self):
-        """Turn auxillary heater off."""
+        """Turn auxiliary heater off."""
         self._aux = False
         self.schedule_update_ha_state()
diff --git a/homeassistant/components/climate/services.yaml b/homeassistant/components/climate/services.yaml
index 4aebb1c85c99..92d821ebbaf0 100644
--- a/homeassistant/components/climate/services.yaml
+++ b/homeassistant/components/climate/services.yaml
@@ -1,5 +1,5 @@
 set_aux_heat:
-  description: Turn auxillary heater on/off for climate device
+  description: Turn auxiliary heater on/off for climate device
 
   fields:
     entity_id:
diff --git a/homeassistant/components/climate/wink.py b/homeassistant/components/climate/wink.py
index f52340dc6273..90b101e1b7b2 100644
--- a/homeassistant/components/climate/wink.py
+++ b/homeassistant/components/climate/wink.py
@@ -281,11 +281,11 @@ class WinkThermostat(WinkDevice, ClimateDevice):
         self.wink.set_fan_mode(fan.lower())
 
     def turn_aux_heat_on(self):
-        """Turn auxillary heater on."""
+        """Turn auxiliary heater on."""
         self.set_operation_mode(STATE_AUX)
 
     def turn_aux_heat_off(self):
-        """Turn auxillary heater off."""
+        """Turn auxiliary heater off."""
         self.set_operation_mode(STATE_AUTO)
 
     @property
diff --git a/homeassistant/components/device_tracker/icloud.py b/homeassistant/components/device_tracker/icloud.py
index e670287dd879..472b48fef6e4 100644
--- a/homeassistant/components/device_tracker/icloud.py
+++ b/homeassistant/components/device_tracker/icloud.py
@@ -248,7 +248,7 @@ class Icloud(DeviceScanner):
                     self._trusted_device, self._verification_code):
                 raise PyiCloudException('Unknown failure')
         except PyiCloudException as error:
-            # Reset to the inital 2FA state to allow the user to retry
+            # Reset to the initial 2FA state to allow the user to retry
             _LOGGER.error("Failed to verify verification code: %s", error)
             self._trusted_device = None
             self._verification_code = None
diff --git a/homeassistant/components/device_tracker/snmp.py b/homeassistant/components/device_tracker/snmp.py
index 3efae2b9ce2e..25176cd82d08 100644
--- a/homeassistant/components/device_tracker/snmp.py
+++ b/homeassistant/components/device_tracker/snmp.py
@@ -75,7 +75,7 @@ class SnmpScanner(DeviceScanner):
         return [client['mac'] for client in self.last_results
                 if client.get('mac')]
 
-    # Supressing no-self-use warning
+    # Suppressing no-self-use warning
     # pylint: disable=R0201
     def get_device_name(self, device):
         """Return the name of the given device or None if we don't know."""
diff --git a/homeassistant/components/device_tracker/xiaomi.py b/homeassistant/components/device_tracker/xiaomi.py
index 8b8db3da2d8b..12e64b724dd3 100644
--- a/homeassistant/components/device_tracker/xiaomi.py
+++ b/homeassistant/components/device_tracker/xiaomi.py
@@ -69,7 +69,7 @@ class XiaomiDeviceScanner(DeviceScanner):
         return self.mac2name.get(device.upper(), None)
 
     def _update_info(self):
-        """Ensure the informations from the router are up to date.
+        """Ensure the information from the router are up to date.
 
         Returns true if scanning successful.
         """
diff --git a/homeassistant/components/downloader.py b/homeassistant/components/downloader.py
index 2e26b306673b..0450ba175ee0 100644
--- a/homeassistant/components/downloader.py
+++ b/homeassistant/components/downloader.py
@@ -122,7 +122,7 @@ def setup(hass, config):
                     _LOGGER.info("Downloading of %s done", url)
 
             except requests.exceptions.ConnectionError:
-                _LOGGER.exception("ConnectionError occured for %s", url)
+                _LOGGER.exception("ConnectionError occurred for %s", url)
 
                 # Remove file if we started downloading but failed
                 if final_path and os.path.isfile(final_path):
diff --git a/homeassistant/components/emulated_hue/__init__.py b/homeassistant/components/emulated_hue/__init__.py
index ca056398d2bf..2feea724cb77 100644
--- a/homeassistant/components/emulated_hue/__init__.py
+++ b/homeassistant/components/emulated_hue/__init__.py
@@ -148,7 +148,7 @@ class Config(object):
                 self.listen_port)
 
         if self.type == TYPE_GOOGLE and self.listen_port != 80:
-            _LOGGER.warning("When targetting Google Home, listening port has "
+            _LOGGER.warning("When targeting Google Home, listening port has "
                             "to be port 80")
 
         # Get whether or not UPNP binds to multicast address (239.255.255.250)
diff --git a/homeassistant/components/emulated_hue/upnp.py b/homeassistant/components/emulated_hue/upnp.py
index 42a258cbf4b4..548b6f3d7719 100644
--- a/homeassistant/components/emulated_hue/upnp.py
+++ b/homeassistant/components/emulated_hue/upnp.py
@@ -1,4 +1,4 @@
-"""Provides a UPNP discovery method that mimicks Hue hubs."""
+"""Provides a UPNP discovery method that mimics Hue hubs."""
 import threading
 import socket
 import logging
@@ -123,14 +123,14 @@ USN: uuid:Socket-1_0-221438K0100073::urn:schemas-upnp-org:device:basic:1
                 if ssdp_socket in read:
                     data, addr = ssdp_socket.recvfrom(1024)
                 else:
-                    # most likely the timeout, so check for interupt
+                    # most likely the timeout, so check for interrupt
                     continue
             except socket.error as ex:
                 if self._interrupted:
                     clean_socket_close(ssdp_socket)
                     return
 
-                _LOGGER.error("UPNP Responder socket exception occured: %s",
+                _LOGGER.error("UPNP Responder socket exception occurred: %s",
                               ex.__str__)
                 # without the following continue, a second exception occurs
                 # because the data object has not been initialized
diff --git a/homeassistant/components/fan/insteon_local.py b/homeassistant/components/fan/insteon_local.py
index 5bdfec084279..e12e3476c3a1 100644
--- a/homeassistant/components/fan/insteon_local.py
+++ b/homeassistant/components/fan/insteon_local.py
@@ -137,7 +137,7 @@ class InsteonLocalFanDevice(FanEntity):
 
     @property
     def name(self):
-        """Return the the name of the node."""
+        """Return the name of the node."""
         return self.node.deviceName
 
     @property
diff --git a/homeassistant/components/image_processing/seven_segments.py b/homeassistant/components/image_processing/seven_segments.py
index d91f46660463..60b2eadee92c 100644
--- a/homeassistant/components/image_processing/seven_segments.py
+++ b/homeassistant/components/image_processing/seven_segments.py
@@ -1,5 +1,5 @@
 """
-Local optical character recognition processing of seven segements displays.
+Local optical character recognition processing of seven segments displays.
 
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/image_processing.seven_segments/
diff --git a/homeassistant/components/knx.py b/homeassistant/components/knx.py
index 047620860b9b..4b976e6ca3f0 100644
--- a/homeassistant/components/knx.py
+++ b/homeassistant/components/knx.py
@@ -217,7 +217,7 @@ class KNXModule(object):
 
     @asyncio.coroutine
     def service_send_to_knx_bus(self, call):
-        """Service for sending an arbitray KNX message to the KNX bus."""
+        """Service for sending an arbitrary KNX message to the KNX bus."""
         from xknx.knx import Telegram, Address, DPTBinary, DPTArray
         attr_payload = call.data.get(SERVICE_KNX_ATTR_PAYLOAD)
         attr_address = call.data.get(SERVICE_KNX_ATTR_ADDRESS)
diff --git a/homeassistant/components/light/hue.py b/homeassistant/components/light/hue.py
index 79d80d2b8a03..d4e650f2ba59 100644
--- a/homeassistant/components/light/hue.py
+++ b/homeassistant/components/light/hue.py
@@ -206,7 +206,7 @@ def setup_bridge(host, hass, add_devices, filename, allow_unreachable,
 
         if not skip_groups:
             # Group ID 0 is a special group in the hub for all lights, but it
-            # is not returned by get_api() so explicity get it and include it.
+            # is not returned by get_api() so explicitly get it and include it.
             # See https://developers.meethue.com/documentation/
             #               groups-api#21_get_all_groups
             _LOGGER.debug("Getting group 0 from bridge")
diff --git a/homeassistant/components/light/insteon_local.py b/homeassistant/components/light/insteon_local.py
index ebd6ab92d0fd..8917a9e9ccf3 100644
--- a/homeassistant/components/light/insteon_local.py
+++ b/homeassistant/components/light/insteon_local.py
@@ -134,7 +134,7 @@ class InsteonLocalDimmerDevice(Light):
 
     @property
     def name(self):
-        """Return the the name of the node."""
+        """Return the name of the node."""
         return self.node.deviceName
 
     @property
diff --git a/homeassistant/components/light/insteon_plm.py b/homeassistant/components/light/insteon_plm.py
index 3b3dd43f4965..51de9f03df58 100644
--- a/homeassistant/components/light/insteon_plm.py
+++ b/homeassistant/components/light/insteon_plm.py
@@ -60,12 +60,12 @@ class InsteonPLMDimmerDevice(Light):
 
     @property
     def address(self):
-        """Return the the address of the node."""
+        """Return the address of the node."""
         return self._address
 
     @property
     def name(self):
-        """Return the the name of the node."""
+        """Return the name of the node."""
         return self._name
 
     @property
diff --git a/homeassistant/components/light/rflink.py b/homeassistant/components/light/rflink.py
index 0b56f1de0acb..4308be107dd0 100644
--- a/homeassistant/components/light/rflink.py
+++ b/homeassistant/components/light/rflink.py
@@ -123,7 +123,7 @@ def devices_from_config(domain_config, hass=None):
             _LOGGER.warning(
                 "Hybrid type for %s not compatible with signal "
                 "repetitions. Please set 'dimmable' or 'switchable' "
-                "type explicity in configuration", device_id)
+                "type explicitly in configuration", device_id)
 
         device = entity_class(device_id, hass, **device_config)
         devices.append(device)
diff --git a/homeassistant/components/light/tellstick.py b/homeassistant/components/light/tellstick.py
index 98af61ffb7d8..598cd22c9860 100644
--- a/homeassistant/components/light/tellstick.py
+++ b/homeassistant/components/light/tellstick.py
@@ -56,7 +56,7 @@ class TellstickLight(TellstickDevice, Light):
         return kwargs.get(ATTR_BRIGHTNESS)
 
     def _parse_tellcore_data(self, tellcore_data):
-        """Turn the value recieved from tellcore into something useful."""
+        """Turn the value received from tellcore into something useful."""
         if tellcore_data is not None:
             brightness = int(tellcore_data)
             return brightness
diff --git a/homeassistant/components/lock/services.yaml b/homeassistant/components/lock/services.yaml
index 04e9f458f9cb..3fde6a2d8ad1 100644
--- a/homeassistant/components/lock/services.yaml
+++ b/homeassistant/components/lock/services.yaml
@@ -17,7 +17,7 @@ get_usercode:
       description: Node id of the lock
       example: 18
     code_slot:
-      description: Code slot to retrive a code from
+      description: Code slot to retrieve a code from
       example: 1
 
 nuki_lock_n_go:
diff --git a/homeassistant/components/media_player/__init__.py b/homeassistant/components/media_player/__init__.py
index 870252cc55e5..2ff957186bac 100644
--- a/homeassistant/components/media_player/__init__.py
+++ b/homeassistant/components/media_player/__init__.py
@@ -637,11 +637,11 @@ class MediaPlayerDevice(Entity):
         return self.hass.async_add_job(self.set_volume_level, volume)
 
     def media_play(self):
-        """Send play commmand."""
+        """Send play command."""
         raise NotImplementedError()
 
     def async_media_play(self):
-        """Send play commmand.
+        """Send play command.
 
         This method must be run in the event loop and returns a coroutine.
         """
diff --git a/homeassistant/components/media_player/cast.py b/homeassistant/components/media_player/cast.py
index 780bd0e31add..2aebbac5043e 100644
--- a/homeassistant/components/media_player/cast.py
+++ b/homeassistant/components/media_player/cast.py
@@ -287,7 +287,7 @@ class CastDevice(MediaPlayerDevice):
         self.cast.set_volume(volume)
 
     def media_play(self):
-        """Send play commmand."""
+        """Send play command."""
         self.cast.media_controller.play()
 
     def media_pause(self):
diff --git a/homeassistant/components/media_player/directv.py b/homeassistant/components/media_player/directv.py
index a334dc7caa4c..a10b5cd8a250 100644
--- a/homeassistant/components/media_player/directv.py
+++ b/homeassistant/components/media_player/directv.py
@@ -1,5 +1,5 @@
 """
-Support for the DirecTV recievers.
+Support for the DirecTV receivers.
 
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/media_player.directv/
@@ -82,7 +82,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 
 class DirecTvDevice(MediaPlayerDevice):
-    """Representation of a DirecTV reciever on the network."""
+    """Representation of a DirecTV receiver on the network."""
 
     def __init__(self, name, host, port, device):
         """Initialize the device."""
diff --git a/homeassistant/components/media_player/openhome.py b/homeassistant/components/media_player/openhome.py
index b2242bfecad5..bca6f2ad7707 100644
--- a/homeassistant/components/media_player/openhome.py
+++ b/homeassistant/components/media_player/openhome.py
@@ -124,7 +124,7 @@ class OpenhomeDevice(MediaPlayerDevice):
         self._device.Stop()
 
     def media_play(self):
-        """Send play commmand."""
+        """Send play command."""
         self._device.Play()
 
     def media_next_track(self):
diff --git a/homeassistant/components/media_player/philips_js.py b/homeassistant/components/media_player/philips_js.py
index da572896ee0f..d8450d31ea40 100644
--- a/homeassistant/components/media_player/philips_js.py
+++ b/homeassistant/components/media_player/philips_js.py
@@ -151,11 +151,11 @@ class PhilipsTV(MediaPlayerDevice):
             self._state = STATE_OFF
 
     def media_previous_track(self):
-        """Send rewind commmand."""
+        """Send rewind command."""
         self._tv.sendKey('Previous')
 
     def media_next_track(self):
-        """Send fast forward commmand."""
+        """Send fast forward command."""
         self._tv.sendKey('Next')
 
     @property
diff --git a/homeassistant/components/media_player/plex.py b/homeassistant/components/media_player/plex.py
index a901cd1d569f..54ec61b50f82 100644
--- a/homeassistant/components/media_player/plex.py
+++ b/homeassistant/components/media_player/plex.py
@@ -711,7 +711,7 @@ class PlexClient(MediaPlayerDevice):
             if ("127.0.0.1" in client.baseurl and
                     client.machineIdentifier == self.device.machineIdentifier):
                 # point controls to server since that's where the
-                # playback is occuring
+                # playback is occurring
                 _LOGGER.debug(
                     "Local client detected, redirecting controls to "
                     "Plex server: %s", self.entity_id)
diff --git a/homeassistant/components/media_player/russound_rnet.py b/homeassistant/components/media_player/russound_rnet.py
index 9ce3dcfc4f46..77a9939c36ca 100644
--- a/homeassistant/components/media_player/russound_rnet.py
+++ b/homeassistant/components/media_player/russound_rnet.py
@@ -135,7 +135,7 @@ class RussoundRNETDevice(MediaPlayerDevice):
     def set_volume_level(self, volume):
         """Set volume level.  Volume has a range (0..1).
 
-        Translate this to a range of (0..100) as expected expected
+        Translate this to a range of (0..100) as expected
         by _russ.set_volume()
         """
         self._russ.set_volume('1', self._zone_id, volume * 100)
diff --git a/homeassistant/components/media_player/services.yaml b/homeassistant/components/media_player/services.yaml
index 2cf3617cc611..993863ea7251 100644
--- a/homeassistant/components/media_player/services.yaml
+++ b/homeassistant/components/media_player/services.yaml
@@ -140,7 +140,7 @@ select_source:
 
   fields:
     entity_id:
-      description: Name(s) of entites to change source on
+      description: Name(s) of entities to change source on
       example: 'media_player.media_player.txnr535_0009b0d81f82'
     source:
       description: Name of the source to switch to. Platform dependent.
@@ -151,7 +151,7 @@ clear_playlist:
 
   fields:
     entity_id:
-      description: Name(s) of entites to change source on
+      description: Name(s) of entities to change source on
       example: 'media_player.living_room_chromecast'
 
 shuffle_set:
@@ -170,7 +170,7 @@ snapcast_snapshot:
 
   fields:
     entity_id:
-      description: Name(s) of entites that will be snapshotted. Platform dependent.
+      description: Name(s) of entities that will be snapshotted. Platform dependent.
       example: 'media_player.living_room'
 
 snapcast_restore:
@@ -178,7 +178,7 @@ snapcast_restore:
 
   fields:
     entity_id:
-      description: Name(s) of entites that will be restored. Platform dependent.
+      description: Name(s) of entities that will be restored. Platform dependent.
       example: 'media_player.living_room'
 
 sonos_join:
@@ -190,7 +190,7 @@ sonos_join:
       example: 'media_player.living_room_sonos'
 
     entity_id:
-      description: Name(s) of entites that will coordinate the grouping. Platform dependent.
+      description: Name(s) of entities that will coordinate the grouping. Platform dependent.
       example: 'media_player.living_room_sonos'
 
 sonos_unjoin:
@@ -198,7 +198,7 @@ sonos_unjoin:
 
   fields:
     entity_id:
-      description: Name(s) of entites that will be unjoined from their group. Platform dependent.
+      description: Name(s) of entities that will be unjoined from their group. Platform dependent.
       example: 'media_player.living_room_sonos'
 
 sonos_snapshot:
@@ -206,7 +206,7 @@ sonos_snapshot:
 
   fields:
     entity_id:
-      description: Name(s) of entites that will be snapshot. Platform dependent.
+      description: Name(s) of entities that will be snapshot. Platform dependent.
       example: 'media_player.living_room_sonos'
 
     with_group:
@@ -218,7 +218,7 @@ sonos_restore:
 
   fields:
     entity_id:
-      description: Name(s) of entites that will be restored. Platform dependent.
+      description: Name(s) of entities that will be restored. Platform dependent.
       example: 'media_player.living_room_sonos'
 
     with_group:
@@ -230,7 +230,7 @@ sonos_set_sleep_timer:
 
   fields:
     entity_id:
-      description: Name(s) of entites that will have a timer set.
+      description: Name(s) of entities that will have a timer set.
       example: 'media_player.living_room_sonos'
     sleep_time:
       description: Number of seconds to set the timer
@@ -241,7 +241,7 @@ sonos_clear_sleep_timer:
 
   fields:
     entity_id:
-      description: Name(s) of entites that will have the timer cleared.
+      description: Name(s) of entities that will have the timer cleared.
       example: 'media_player.living_room_sonos'
 
 
diff --git a/homeassistant/components/media_player/sonos.py b/homeassistant/components/media_player/sonos.py
index a5ef91ecc87a..410728dafaab 100644
--- a/homeassistant/components/media_player/sonos.py
+++ b/homeassistant/components/media_player/sonos.py
@@ -915,8 +915,8 @@ class SonosDevice(MediaPlayerDevice):
         """Replace queue with playlist represented by src.
 
         Playlists can't be played directly with the self._player.play_uri
-        API as they are actually composed of mulitple URLs. Until soco has
-        suppport for playing a playlist, we'll need to parse the playlist item
+        API as they are actually composed of multiple URLs. Until soco has
+        support for playing a playlist, we'll need to parse the playlist item
         and replace the current queue in order to play it.
         """
         import soco
@@ -1116,7 +1116,7 @@ class SonosDevice(MediaPlayerDevice):
                 return
 
             ##
-            # old is allready master, rejoin
+            # old is already master, rejoin
             if old.coordinator.group.coordinator == old.coordinator:
                 self._player.join(old.coordinator)
                 return
diff --git a/homeassistant/components/media_player/universal.py b/homeassistant/components/media_player/universal.py
index b79c708c33c8..9647f04f5c3a 100644
--- a/homeassistant/components/media_player/universal.py
+++ b/homeassistant/components/media_player/universal.py
@@ -441,7 +441,7 @@ class UniversalMediaPlayer(MediaPlayerDevice):
             SERVICE_VOLUME_SET, data, allow_override=True)
 
     def async_media_play(self):
-        """Send play commmand.
+        """Send play command.
 
         This method must be run in the event loop and returns a coroutine.
         """
diff --git a/homeassistant/components/media_player/vlc.py b/homeassistant/components/media_player/vlc.py
index f77b06054e12..d33464950150 100644
--- a/homeassistant/components/media_player/vlc.py
+++ b/homeassistant/components/media_player/vlc.py
@@ -137,7 +137,7 @@ class VlcDevice(MediaPlayerDevice):
         self._volume = volume
 
     def media_play(self):
-        """Send play commmand."""
+        """Send play command."""
         self._vlc.play()
         self._state = STATE_PLAYING
 
diff --git a/homeassistant/components/media_player/yamaha.py b/homeassistant/components/media_player/yamaha.py
index f2e64b1fb251..c413bfd3357d 100644
--- a/homeassistant/components/media_player/yamaha.py
+++ b/homeassistant/components/media_player/yamaha.py
@@ -214,7 +214,7 @@ class YamahaDevice(MediaPlayerDevice):
         self._volume = (self._receiver.volume / 100) + 1
 
     def media_play(self):
-        """Send play commmand."""
+        """Send play command."""
         self._call_playback_function(self._receiver.play, "play")
 
     def media_pause(self):
diff --git a/homeassistant/components/notify/apns.py b/homeassistant/components/notify/apns.py
index 136d53001832..250ef5c50c84 100644
--- a/homeassistant/components/notify/apns.py
+++ b/homeassistant/components/notify/apns.py
@@ -111,7 +111,7 @@ class ApnsDevice(object):
         return self.device_disabled
 
     def disable(self):
-        """Disable the device from recieving notifications."""
+        """Disable the device from receiving notifications."""
         self.device_disabled = True
 
     def __eq__(self, other):
diff --git a/homeassistant/components/notify/kodi.py b/homeassistant/components/notify/kodi.py
index eda01c130869..05f4c5d17f3c 100644
--- a/homeassistant/components/notify/kodi.py
+++ b/homeassistant/components/notify/kodi.py
@@ -53,7 +53,7 @@ def async_get_service(hass, config, discovery_info=None):
     if host.startswith('http://') or host.startswith('https://'):
         host = host.lstrip('http://').lstrip('https://')
         _LOGGER.warning(
-            "Kodi host name should no longer conatin http:// See updated "
+            "Kodi host name should no longer contain http:// See updated "
             "definitions here: "
             "https://home-assistant.io/components/media_player.kodi/")
 
diff --git a/homeassistant/components/recorder/migration.py b/homeassistant/components/recorder/migration.py
index 5a68fe43fe0a..325267b857eb 100644
--- a/homeassistant/components/recorder/migration.py
+++ b/homeassistant/components/recorder/migration.py
@@ -47,7 +47,7 @@ def _create_index(engine, table_name, index_name):
 
     table = Table(table_name, models.Base.metadata)
     _LOGGER.debug("Looking up index for table %s", table_name)
-    # Look up the index object by name from the table is the the models
+    # Look up the index object by name from the table is the models
     index = next(idx for idx in table.indexes if idx.name == index_name)
     _LOGGER.debug("Creating %s index", index_name)
     _LOGGER.info("Adding index `%s` to database. Note: this can take several "
@@ -151,7 +151,7 @@ def _apply_update(engine, new_version, old_version):
 def _inspect_schema_version(engine, session):
     """Determine the schema version by inspecting the db structure.
 
-    When the schema verison is not present in the db, either db was just
+    When the schema version is not present in the db, either db was just
     created with the correct schema, or this is a db created before schema
     versions were tracked. For now, we'll test if the changes for schema
     version 1 are present to make the determination. Eventually this logic
diff --git a/homeassistant/components/sensor/dsmr.py b/homeassistant/components/sensor/dsmr.py
index 76fde35410d3..4f360e860bd4 100644
--- a/homeassistant/components/sensor/dsmr.py
+++ b/homeassistant/components/sensor/dsmr.py
@@ -155,7 +155,7 @@ def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
                     stop_listerer()
 
                 # reflect disconnect state in devices state by setting an
-                # empty telegram resulting in `unkown` states
+                # empty telegram resulting in `unknown` states
                 update_entities_telegram({})
 
                 # throttle reconnect attempts
@@ -181,7 +181,7 @@ class DSMREntity(Entity):
         if self._obis not in self.telegram:
             return None
 
-        # get the attibute value if the object has it
+        # get the attribute value if the object has it
         dsmr_object = self.telegram[self._obis]
         return getattr(dsmr_object, attribute, None)
 
diff --git a/homeassistant/components/sensor/envirophat.py b/homeassistant/components/sensor/envirophat.py
index f2db833954f5..ce5e2a819397 100644
--- a/homeassistant/components/sensor/envirophat.py
+++ b/homeassistant/components/sensor/envirophat.py
@@ -171,7 +171,7 @@ class EnvirophatData(object):
         self.light = self.envirophat.light.light()
         if self.use_leds:
             self.envirophat.leds.on()
-        # the three color values scaled agains the overall light, 0-255
+        # the three color values scaled against the overall light, 0-255
         self.light_red, self.light_green, self.light_blue = \
             self.envirophat.light.rgb()
         if self.use_leds:
diff --git a/homeassistant/components/sensor/modbus.py b/homeassistant/components/sensor/modbus.py
index 9453daea413a..0b2198bd3968 100644
--- a/homeassistant/components/sensor/modbus.py
+++ b/homeassistant/components/sensor/modbus.py
@@ -71,7 +71,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 
 class ModbusRegisterSensor(Entity):
-    """Modbus resgister sensor."""
+    """Modbus register sensor."""
 
     def __init__(self, name, slave, register, register_type,
                  unit_of_measurement, count, scale, offset, data_type,
diff --git a/homeassistant/components/sensor/wunderground.py b/homeassistant/components/sensor/wunderground.py
index 8f9a5ef1862d..b68ef67bf374 100644
--- a/homeassistant/components/sensor/wunderground.py
+++ b/homeassistant/components/sensor/wunderground.py
@@ -139,7 +139,7 @@ class WUDailySimpleForecastSensorConfig(WUSensorConfig):
             wu_unit (string): "fahrenheit", "celsius", "degrees" etc.
                  see the example json at:
         https://www.wunderground.com/weather/api/d/docs?d=data/forecast&MR=1
-            ha_unit (string): coresponding unit in home assistant
+            ha_unit (string): corresponding unit in home assistant
             title (string): friendly_name of the sensor
         """
         super().__init__(
diff --git a/homeassistant/components/services.yaml b/homeassistant/components/services.yaml
index 865a6c7df588..0c9f1daf70f2 100644
--- a/homeassistant/components/services.yaml
+++ b/homeassistant/components/services.yaml
@@ -162,7 +162,7 @@ homematic:
         example: 1
 
   set_dev_value:
-    description: Set a device property on RPC XML inteface.
+    description: Set a device property on RPC XML interface.
 
     fields:
       address:
@@ -333,7 +333,7 @@ hdmi_cec:
     description: Select HDMI device.
     fields:
       device:
-        description: Addres of device to select. Can be entity_id, physical address or alias from confuguration.
+        description: Address of device to select. Can be entity_id, physical address or alias from confuguration.
         example: '"switch.hdmi_1" or "1.1.0.0" or "01:10"'
 
   power_on:
@@ -347,21 +347,21 @@ ffmpeg:
     description: Send a start command to a ffmpeg based sensor.
     fields:
       entity_id:
-        description: Name(s) of entites that will start. Platform dependent.
+        description: Name(s) of entities that will start. Platform dependent.
         example: 'binary_sensor.ffmpeg_noise'
 
   stop:
     description: Send a stop command to a ffmpeg based sensor.
     fields:
       entity_id:
-        description: Name(s) of entites that will stop. Platform dependent.
+        description: Name(s) of entities that will stop. Platform dependent.
         example: 'binary_sensor.ffmpeg_noise'
 
   restart:
     description: Send a restart command to a ffmpeg based sensor.
     fields:
       entity_id:
-        description: Name(s) of entites that will restart. Platform dependent.
+        description: Name(s) of entities that will restart. Platform dependent.
         example: 'binary_sensor.ffmpeg_noise'
 
 logger:
diff --git a/homeassistant/components/sleepiq.py b/homeassistant/components/sleepiq.py
index d9d81d3fee0c..baf6d154c669 100644
--- a/homeassistant/components/sleepiq.py
+++ b/homeassistant/components/sleepiq.py
@@ -117,7 +117,7 @@ class SleepIQSensor(Entity):
     def update(self):
         """Get the latest data from SleepIQ and updates the states."""
         # Call the API for new sleepiq data. Each sensor will re-trigger this
-        # same exact call, but thats fine. We cache results for a short period
+        # same exact call, but that's fine. We cache results for a short period
         # of time to prevent hitting API limits.
         self.sleepiq_data.update()
 
diff --git a/homeassistant/components/switch/acer_projector.py b/homeassistant/components/switch/acer_projector.py
index f32829b06330..58361b2e8b2d 100644
--- a/homeassistant/components/switch/acer_projector.py
+++ b/homeassistant/components/switch/acer_projector.py
@@ -109,7 +109,7 @@ class AcerSwitch(SwitchDevice):
 
     def _write_read_format(self, msg):
         """Write msg, obtain awnser and format output."""
-        # awnsers are formated as ***\rawnser\r***
+        # awnsers are formatted as ***\rawnser\r***
         awns = self._write_read(msg)
         match = re.search(r'\r(.+)\r', awns)
         if match:
diff --git a/homeassistant/components/switch/android_ip_webcam.py b/homeassistant/components/switch/android_ip_webcam.py
index df86b3fbb8ff..8de2ce593afb 100644
--- a/homeassistant/components/switch/android_ip_webcam.py
+++ b/homeassistant/components/switch/android_ip_webcam.py
@@ -47,7 +47,7 @@ class IPWebcamSettingsSwitch(AndroidIPCamEntity, SwitchDevice):
 
     @property
     def name(self):
-        """Return the the name of the node."""
+        """Return the name of the node."""
         return self._name
 
     @asyncio.coroutine
diff --git a/homeassistant/components/switch/insteon_local.py b/homeassistant/components/switch/insteon_local.py
index 94259b8bb800..674a20278b38 100644
--- a/homeassistant/components/switch/insteon_local.py
+++ b/homeassistant/components/switch/insteon_local.py
@@ -130,7 +130,7 @@ class InsteonLocalSwitchDevice(SwitchDevice):
 
     @property
     def name(self):
-        """Return the the name of the node."""
+        """Return the name of the node."""
         return self.node.deviceName
 
     @property
diff --git a/homeassistant/components/switch/insteon_plm.py b/homeassistant/components/switch/insteon_plm.py
index ee192b82be44..ed7d0ffc4793 100644
--- a/homeassistant/components/switch/insteon_plm.py
+++ b/homeassistant/components/switch/insteon_plm.py
@@ -55,12 +55,12 @@ class InsteonPLMSwitchDevice(SwitchDevice):
 
     @property
     def address(self):
-        """Return the the address of the node."""
+        """Return the address of the node."""
         return self._address
 
     @property
     def name(self):
-        """Return the the name of the node."""
+        """Return the name of the node."""
         return self._name
 
     @property
diff --git a/homeassistant/components/switch/services.yaml b/homeassistant/components/switch/services.yaml
index 00b2abb91a4d..5fdd8142ffc7 100644
--- a/homeassistant/components/switch/services.yaml
+++ b/homeassistant/components/switch/services.yaml
@@ -29,7 +29,7 @@ mysensors_send_ir_code:
 
   fields:
     entity_id:
-      description: Name(s) of entites that should have the IR code set and be turned on. Platform dependent.
+      description: Name(s) of entities that should have the IR code set and be turned on. Platform dependent.
       example: 'switch.living_room_1_1'
 
     V_IR_SEND:
diff --git a/homeassistant/components/switch/tellstick.py b/homeassistant/components/switch/tellstick.py
index c631eedc050a..de7a3bf45456 100644
--- a/homeassistant/components/switch/tellstick.py
+++ b/homeassistant/components/switch/tellstick.py
@@ -39,7 +39,7 @@ class TellstickSwitch(TellstickDevice, ToggleEntity):
         return None
 
     def _parse_tellcore_data(self, tellcore_data):
-        """Turn the value recieved from tellcore into something useful."""
+        """Turn the value received from tellcore into something useful."""
         return None
 
     def _update_model(self, new_state, data):
diff --git a/homeassistant/components/tellduslive.py b/homeassistant/components/tellduslive.py
index 01ccb981cfad..1f2b37200624 100644
--- a/homeassistant/components/tellduslive.py
+++ b/homeassistant/components/tellduslive.py
@@ -53,7 +53,8 @@ def setup(hass, config):
     if not client.validate_session():
         _LOGGER.error(
             "Authentication Error: Please make sure you have configured your "
-            "keys that can be aquired from https://api.telldus.com/keys/index")
+            "keys that can be acquired from "
+            "https://api.telldus.com/keys/index")
         return False
 
     hass.data[DOMAIN] = client
@@ -173,7 +174,7 @@ class TelldusLiveEntity(Entity):
 
     @property
     def device(self):
-        """Return the representaion of the device."""
+        """Return the representation of the device."""
         return self._client.device(self.device_id)
 
     @property
diff --git a/homeassistant/components/tellstick.py b/homeassistant/components/tellstick.py
index 5d0ec78dfa7c..6ae96b88da75 100644
--- a/homeassistant/components/tellstick.py
+++ b/homeassistant/components/tellstick.py
@@ -192,7 +192,7 @@ class TellstickDevice(Entity):
         raise NotImplementedError
 
     def _parse_tellcore_data(self, tellcore_data):
-        """Turn the value recieved from tellcore into something useful."""
+        """Turn the value received from tellcore into something useful."""
         raise NotImplementedError
 
     def _update_model(self, new_state, data):
diff --git a/homeassistant/components/vacuum/roomba.py b/homeassistant/components/vacuum/roomba.py
index 37cd9d067856..500b98420fc0 100644
--- a/homeassistant/components/vacuum/roomba.py
+++ b/homeassistant/components/vacuum/roomba.py
@@ -310,7 +310,7 @@ class RoombaVacuum(VacuumDevice):
         if error_msg and error_msg != 'None':
             self._state_attrs[ATTR_ERROR] = error_msg
 
-        # Not all Roombas expose positon data
+        # Not all Roombas expose position data
         # https://github.com/koalazak/dorita980/issues/48
         if self._capabilities[CAP_POSITION]:
             pos_state = state.get('pose', {})
diff --git a/homeassistant/components/zha/__init__.py b/homeassistant/components/zha/__init__.py
index 1b2d46ee72b0..55fb0e41cb24 100644
--- a/homeassistant/components/zha/__init__.py
+++ b/homeassistant/components/zha/__init__.py
@@ -218,7 +218,7 @@ class ApplicationListener:
 class Entity(entity.Entity):
     """A base class for ZHA entities."""
 
-    _domain = None  # Must be overriden by subclasses
+    _domain = None  # Must be overridden by subclasses
 
     def __init__(self, endpoint, in_clusters, out_clusters, manufacturer,
                  model, **kwargs):
diff --git a/homeassistant/core.py b/homeassistant/core.py
index 187dfcf1b836..a8704869f210 100644
--- a/homeassistant/core.py
+++ b/homeassistant/core.py
@@ -218,7 +218,7 @@ class HomeAssistant(object):
         else:
             task = self.loop.run_in_executor(None, target, *args)
 
-        # If a task is sheduled
+        # If a task is scheduled
         if self._track_task and task is not None:
             self._pending_tasks.append(task)
 
@@ -914,7 +914,7 @@ class ServiceRegistry(object):
         Waits a maximum of SERVICE_CALL_LIMIT.
 
         If blocking = True, will return boolean if service executed
-        succesfully within SERVICE_CALL_LIMIT.
+        successfully within SERVICE_CALL_LIMIT.
 
         This method will fire an event to call the service.
         This event will be picked up by this ServiceRegistry and any
@@ -937,7 +937,7 @@ class ServiceRegistry(object):
         Waits a maximum of SERVICE_CALL_LIMIT.
 
         If blocking = True, will return boolean if service executed
-        succesfully within SERVICE_CALL_LIMIT.
+        successfully within SERVICE_CALL_LIMIT.
 
         This method will fire an event to call the service.
         This event will be picked up by this ServiceRegistry and any
diff --git a/homeassistant/helpers/entity.py b/homeassistant/helpers/entity.py
index 835b616987cb..b2928e73070a 100644
--- a/homeassistant/helpers/entity.py
+++ b/homeassistant/helpers/entity.py
@@ -71,7 +71,7 @@ class Entity(object):
     # If we reported if this entity was slow
     _slow_reported = False
 
-    # protect for multible updates
+    # protect for multiple updates
     _update_warn = None
 
     @property
diff --git a/homeassistant/helpers/script.py b/homeassistant/helpers/script.py
index b44905a31410..bafaf4d0fdbb 100644
--- a/homeassistant/helpers/script.py
+++ b/homeassistant/helpers/script.py
@@ -117,7 +117,7 @@ class Script():
                 wait_template = action[CONF_WAIT_TEMPLATE]
                 wait_template.hass = self.hass
 
-                # check if condition allready okay
+                # check if condition already okay
                 if condition.async_template(
                         self.hass, wait_template, variables):
                     continue
diff --git a/homeassistant/scripts/influxdb_migrator.py b/homeassistant/scripts/influxdb_migrator.py
index 6f130d187572..cad8f878ca6c 100644
--- a/homeassistant/scripts/influxdb_migrator.py
+++ b/homeassistant/scripts/influxdb_migrator.py
@@ -104,7 +104,7 @@ def run(script_args: List) -> int:
     for index, measurement in enumerate(measurements):
         client.query('''SELECT * INTO {}..:MEASUREMENT FROM '''
                      '"{}" GROUP BY *'.format(old_dbname, measurement))
-        # Print progess
+        # Print progress
         print_progress(index + 1, nb_measurements)
 
     # Delete the database
@@ -184,7 +184,7 @@ def run(script_args: List) -> int:
             else:
                 # Increment offset
                 offset += args.step
-        # Print progess
+        # Print progress
         print_progress(index + 1, nb_measurements)
 
     # Delete database if needed
diff --git a/homeassistant/util/__init__.py b/homeassistant/util/__init__.py
index 824f3969b2c2..646edcf1c356 100644
--- a/homeassistant/util/__init__.py
+++ b/homeassistant/util/__init__.py
@@ -268,7 +268,7 @@ class Throttle(object):
 
         # We want to be able to differentiate between function and unbound
         # methods (which are considered functions).
-        # All methods have the classname in their qualname seperated by a '.'
+        # All methods have the classname in their qualname separated by a '.'
         # Functions have a '.' in their qualname if defined inline, but will
         # be prefixed by '.<locals>.' so we strip that out.
         is_func = (not hasattr(method, '__self__') and
diff --git a/homeassistant/util/color.py b/homeassistant/util/color.py
index d76816cfbb88..9616774c6230 100644
--- a/homeassistant/util/color.py
+++ b/homeassistant/util/color.py
@@ -10,7 +10,7 @@ _LOGGER = logging.getLogger(__name__)
 # Official CSS3 colors from w3.org:
 # https://www.w3.org/TR/2010/PR-css3-color-20101028/#html4
 # names do not have spaces in them so that we can compare against
-# reuqests more easily (by removing spaces from the requests as well).
+# requests more easily (by removing spaces from the requests as well).
 # This lets "dark seagreen" and "dark sea green" both match the same
 # color "darkseagreen".
 COLORS = {
@@ -308,7 +308,7 @@ def color_rgbw_to_rgb(r, g, b, w):
     # Add the white channel back into the rgb channels.
     rgb = (r + w, g + w, b + w)
 
-    # Match the output maximum value to the input. This ensures the the
+    # Match the output maximum value to the input. This ensures the
     # output doesn't overflow.
     return _match_max_scale((r, g, b, w), rgb)
 
diff --git a/homeassistant/util/location.py b/homeassistant/util/location.py
index c7bc42052979..8b07a344148d 100644
--- a/homeassistant/util/location.py
+++ b/homeassistant/util/location.py
@@ -146,7 +146,7 @@ def vincenty(point1: Tuple[float, float], point2: Tuple[float, float],
                                           (-3 + 4 * cos2SigmaM ** 2)))
     s = AXIS_B * A * (sigma - deltaSigma)
 
-    s /= 1000  # Converion of meters to kilometers
+    s /= 1000  # Conversion of meters to kilometers
     if miles:
         s *= MILES_PER_KILOMETER  # kilometers to miles
 
diff --git a/script/test_docker b/script/test_docker
index 9f3bbb4be075..bbea52a3a0bd 100755
--- a/script/test_docker
+++ b/script/test_docker
@@ -1,6 +1,6 @@
 #!/bin/sh
 # Executes the tests with tox in a docker container.
-# Every argment is passed to tox to allow running only a subset of tests.
+# Every argument is passed to tox to allow running only a subset of tests.
 # The following example will only run media_player tests:
 # ./test_docker -- tests/components/media_player/
 
diff --git a/tests/common.py b/tests/common.py
index f0d6a5bd057d..d7b603cca58d 100644
--- a/tests/common.py
+++ b/tests/common.py
@@ -477,7 +477,7 @@ def assert_setup_component(count, domain=None):
     - domain: The domain to count is optional. It can be automatically
               determined most of the time
 
-    Use as a context manager aroung setup.setup_component
+    Use as a context manager around setup.setup_component
         with assert_setup_component(0) as result_config:
             setup_component(hass, domain, start_config)
             # using result_config is optional
diff --git a/tests/components/binary_sensor/test_aurora.py b/tests/components/binary_sensor/test_aurora.py
index c18d07575cae..ed68d23905f5 100644
--- a/tests/components/binary_sensor/test_aurora.py
+++ b/tests/components/binary_sensor/test_aurora.py
@@ -64,7 +64,7 @@ class TestAuroraSensorSetUp(unittest.TestCase):
 
     @requests_mock.Mocker()
     def test_custom_threshold_works(self, mock_req):
-        """Test that the the config can take a custom forecast threshold."""
+        """Test that the config can take a custom forecast threshold."""
         uri = re.compile(
             "http://services\.swpc\.noaa\.gov/text/aurora-nowcast-map\.txt"
         )
diff --git a/tests/components/camera/test_init.py b/tests/components/camera/test_init.py
index 4b69116f0104..97f6c0385df2 100644
--- a/tests/components/camera/test_init.py
+++ b/tests/components/camera/test_init.py
@@ -27,7 +27,7 @@ class TestSetupCamera(object):
         self.hass.stop()
 
     def test_setup_component(self):
-        """Setup demo platfrom on camera component."""
+        """Setup demo platform on camera component."""
         config = {
             camera.DOMAIN: {
                 'platform': 'demo'
diff --git a/tests/components/climate/test_demo.py b/tests/components/climate/test_demo.py
index 27d79b40aa88..d15249d61f3d 100644
--- a/tests/components/climate/test_demo.py
+++ b/tests/components/climate/test_demo.py
@@ -230,7 +230,7 @@ class TestDemoClimate(unittest.TestCase):
         self.assertEqual(None, state.attributes.get('hold_mode'))
 
     def test_set_aux_heat_bad_attr(self):
-        """Test setting the auxillary heater without required attribute."""
+        """Test setting the auxiliary heater without required attribute."""
         state = self.hass.states.get(ENTITY_CLIMATE)
         self.assertEqual('off', state.attributes.get('aux_heat'))
         climate.set_aux_heat(self.hass, None, ENTITY_CLIMATE)
@@ -245,7 +245,7 @@ class TestDemoClimate(unittest.TestCase):
         self.assertEqual('on', state.attributes.get('aux_heat'))
 
     def test_set_aux_heat_off(self):
-        """Test setting the auxillary heater off/false."""
+        """Test setting the auxiliary heater off/false."""
         climate.set_aux_heat(self.hass, False, ENTITY_CLIMATE)
         self.hass.block_till_done()
         state = self.hass.states.get(ENTITY_CLIMATE)
diff --git a/tests/components/cloud/test_http_api.py b/tests/components/cloud/test_http_api.py
index fc9b3cce8644..e79f23c0845b 100644
--- a/tests/components/cloud/test_http_api.py
+++ b/tests/components/cloud/test_http_api.py
@@ -142,7 +142,7 @@ def test_logout_view_request_timeout(mock_auth, cloud_client):
 
 @asyncio.coroutine
 def test_logout_view_unknown_error(mock_auth, cloud_client):
-    """Test unknown error while loggin out."""
+    """Test unknown error while logging out."""
     mock_auth.logout.side_effect = auth_api.UnknownError
     req = yield from cloud_client.post('/api/cloud/logout')
     assert req.status == 502
@@ -186,7 +186,7 @@ def test_register_view_request_timeout(mock_cognito, cloud_client):
 
 @asyncio.coroutine
 def test_register_view_unknown_error(mock_cognito, cloud_client):
-    """Test unknown error while loggin out."""
+    """Test unknown error while logging out."""
     mock_cognito.register.side_effect = auth_api.UnknownError
     req = yield from cloud_client.post('/api/cloud/register', json={
         'email': 'hello@bla.com',
@@ -233,7 +233,7 @@ def test_confirm_register_view_request_timeout(mock_cognito, cloud_client):
 
 @asyncio.coroutine
 def test_confirm_register_view_unknown_error(mock_cognito, cloud_client):
-    """Test unknown error while loggin out."""
+    """Test unknown error while logging out."""
     mock_cognito.confirm_sign_up.side_effect = auth_api.UnknownError
     req = yield from cloud_client.post('/api/cloud/confirm_register', json={
         'email': 'hello@bla.com',
@@ -274,7 +274,7 @@ def test_forgot_password_view_request_timeout(mock_cognito, cloud_client):
 
 @asyncio.coroutine
 def test_forgot_password_view_unknown_error(mock_cognito, cloud_client):
-    """Test unknown error while loggin out."""
+    """Test unknown error while logging out."""
     mock_cognito.initiate_forgot_password.side_effect = auth_api.UnknownError
     req = yield from cloud_client.post('/api/cloud/forgot_password', json={
         'email': 'hello@bla.com',
@@ -329,7 +329,7 @@ def test_confirm_forgot_password_view_request_timeout(mock_cognito,
 @asyncio.coroutine
 def test_confirm_forgot_password_view_unknown_error(mock_cognito,
                                                     cloud_client):
-    """Test unknown error while loggin out."""
+    """Test unknown error while logging out."""
     mock_cognito.confirm_forgot_password.side_effect = auth_api.UnknownError
     req = yield from cloud_client.post(
         '/api/cloud/confirm_forgot_password', json={
diff --git a/tests/components/emulated_hue/test_init.py b/tests/components/emulated_hue/test_init.py
index 2dcb9ecbf21c..b9ef09fe4a74 100755
--- a/tests/components/emulated_hue/test_init.py
+++ b/tests/components/emulated_hue/test_init.py
@@ -125,4 +125,4 @@ def test_warning_config_google_home_listen_port():
 
         assert mock_warn.called
         assert mock_warn.mock_calls[0][1][0] == \
-            "When targetting Google Home, listening port has to be port 80"
+            "When targeting Google Home, listening port has to be port 80"
diff --git a/tests/components/image_processing/test_init.py b/tests/components/image_processing/test_init.py
index 816976751a71..0594c436abd2 100644
--- a/tests/components/image_processing/test_init.py
+++ b/tests/components/image_processing/test_init.py
@@ -24,7 +24,7 @@ class TestSetupImageProcessing(object):
         self.hass.stop()
 
     def test_setup_component(self):
-        """Setup demo platfrom on image_process component."""
+        """Setup demo platform on image_process component."""
         config = {
             ip.DOMAIN: {
                 'platform': 'demo'
@@ -35,7 +35,7 @@ class TestSetupImageProcessing(object):
             setup_component(self.hass, ip.DOMAIN, config)
 
     def test_setup_component_with_service(self):
-        """Setup demo platfrom on image_process component test service."""
+        """Setup demo platform on image_process component test service."""
         config = {
             ip.DOMAIN: {
                 'platform': 'demo'
diff --git a/tests/components/light/test_mochad.py b/tests/components/light/test_mochad.py
index b1644effd574..e69ebdb4aef7 100644
--- a/tests/components/light/test_mochad.py
+++ b/tests/components/light/test_mochad.py
@@ -32,7 +32,7 @@ class TestMochadSwitchSetup(unittest.TestCase):
         self.hass = get_test_home_assistant()
 
     def tearDown(self):
-        """Stop everyhing that was started."""
+        """Stop everything that was started."""
         self.hass.stop()
 
     @mock.patch('homeassistant.components.light.mochad.MochadLight')
diff --git a/tests/components/media_player/test_yamaha.py b/tests/components/media_player/test_yamaha.py
index 8cea5f7c63e4..ad443fadebb9 100644
--- a/tests/components/media_player/test_yamaha.py
+++ b/tests/components/media_player/test_yamaha.py
@@ -29,7 +29,7 @@ class FakeYamaha(rxv.rxv.RXV):
 
     @property
     def input(self):
-        """A fake input for the reciever."""
+        """A fake input for the receiver."""
         return self._fake_input
 
     @input.setter
@@ -39,7 +39,7 @@ class FakeYamaha(rxv.rxv.RXV):
         self._fake_input = input_name
 
     def inputs(self):
-        """All inputs of the the fake receiver."""
+        """All inputs of the fake receiver."""
         return {'AUDIO1': None,
                 'AUDIO2': None,
                 'AV1': None,
diff --git a/tests/components/sensor/test_mfi.py b/tests/components/sensor/test_mfi.py
index 8b037209cbc9..ae967449ef21 100644
--- a/tests/components/sensor/test_mfi.py
+++ b/tests/components/sensor/test_mfi.py
@@ -61,7 +61,7 @@ class TestMfiSensorSetup(unittest.TestCase):
 
     @mock.patch('mficlient.client.MFiClient')
     def test_setup_failed_connect(self, mock_client):
-        """Test setup with conection failure."""
+        """Test setup with connection failure."""
         mock_client.side_effect = requests.exceptions.ConnectionError
         self.assertFalse(
             self.PLATFORM.setup_platform(
diff --git a/tests/components/switch/test_mochad.py b/tests/components/switch/test_mochad.py
index 0851bfbc324c..8011d85860e7 100644
--- a/tests/components/switch/test_mochad.py
+++ b/tests/components/switch/test_mochad.py
@@ -32,7 +32,7 @@ class TestMochadSwitchSetup(unittest.TestCase):
         self.hass = get_test_home_assistant()
 
     def tearDown(self):
-        """Stop everyhing that was started."""
+        """Stop everything that was started."""
         self.hass.stop()
 
     @mock.patch('homeassistant.components.switch.mochad.MochadSwitch')
diff --git a/tests/components/switch/test_rflink.py b/tests/components/switch/test_rflink.py
index b261d9c9b49a..f215b16d7466 100644
--- a/tests/components/switch/test_rflink.py
+++ b/tests/components/switch/test_rflink.py
@@ -81,7 +81,7 @@ def test_default_setup(hass, monkeypatch):
     assert hass.states.get('switch.test').state == 'on'
 
     # The switch component does not support adding new devices for incoming
-    # events because every new unkown device is added as a light by default.
+    # events because every new unknown device is added as a light by default.
 
     # test changing state from HA propagates to Rflink
     hass.async_add_job(
diff --git a/tests/components/test_influxdb.py b/tests/components/test_influxdb.py
index f117b62fddb7..7c98dfcd540d 100644
--- a/tests/components/test_influxdb.py
+++ b/tests/components/test_influxdb.py
@@ -578,7 +578,7 @@ class TestInfluxDB(unittest.TestCase):
         mock_client.return_value.write_points.reset_mock()
 
     def test_event_listener_component_override_measurement(self, mock_client):
-        """Test the event listener with overrided measurements."""
+        """Test the event listener with overridden measurements."""
         config = {
             'influxdb': {
                 'host': 'host',
diff --git a/tests/components/test_init.py b/tests/components/test_init.py
index 222d25f644a1..06ba8a57508f 100644
--- a/tests/components/test_init.py
+++ b/tests/components/test_init.py
@@ -82,7 +82,7 @@ class TestComponentsCore(unittest.TestCase):
 
         # We can't test if our service call results in services being called
         # because by mocking out the call service method, we mock out all
-        # So we mimick how the service registry calls services
+        # So we mimic how the service registry calls services
         service_call = ha.ServiceCall('homeassistant', 'turn_on', {
             'entity_id': ['light.test', 'sensor.bla', 'light.bla']
         })
diff --git a/tests/components/test_logbook.py b/tests/components/test_logbook.py
index aa4bc9fdf8c4..07c89b5dcd17 100644
--- a/tests/components/test_logbook.py
+++ b/tests/components/test_logbook.py
@@ -415,7 +415,7 @@ class TestComponentLogbook(unittest.TestCase):
     def test_home_assistant_start_stop_grouped(self):
         """Test if HA start and stop events are grouped.
 
-        Events that are occuring in the same minute.
+        Events that are occurring in the same minute.
         """
         entries = list(logbook.humanify((
             ha.Event(EVENT_HOMEASSISTANT_STOP),
diff --git a/tests/helpers/test_entity_component.py b/tests/helpers/test_entity_component.py
index 11717c75e202..efa079a7e4a4 100644
--- a/tests/helpers/test_entity_component.py
+++ b/tests/helpers/test_entity_component.py
@@ -183,7 +183,7 @@ class TestHelpersEntityComponent(unittest.TestCase):
         assert 2 == len(self.hass.states.entity_ids())
 
     def test_update_state_adds_entities_with_update_befor_add_true(self):
-        """Test if call update befor add to state machine."""
+        """Test if call update before add to state machine."""
         component = EntityComponent(_LOGGER, DOMAIN, self.hass)
 
         ent = EntityTest()
@@ -196,7 +196,7 @@ class TestHelpersEntityComponent(unittest.TestCase):
         assert ent.update.called
 
     def test_update_state_adds_entities_with_update_befor_add_false(self):
-        """Test if not call update befor add to state machine."""
+        """Test if not call update before add to state machine."""
         component = EntityComponent(_LOGGER, DOMAIN, self.hass)
 
         ent = EntityTest()
@@ -209,7 +209,7 @@ class TestHelpersEntityComponent(unittest.TestCase):
         assert not ent.update.called
 
     def test_adds_entities_with_update_befor_add_true_deadlock_protect(self):
-        """Test if call update befor add to state machine.
+        """Test if call update before add to state machine.
 
         It need to run update inside executor and never call
         async_add_entities with True
diff --git a/tests/util/test_yaml.py b/tests/util/test_yaml.py
index 1b0b808b9c4b..918a684f3221 100644
--- a/tests/util/test_yaml.py
+++ b/tests/util/test_yaml.py
@@ -54,8 +54,8 @@ class TestYaml(unittest.TestCase):
                 patch_yaml_files(files):
             yaml.load_yaml(YAML_CONFIG_FILE)
 
-    def test_enviroment_variable(self):
-        """Test config file with enviroment variable."""
+    def test_environment_variable(self):
+        """Test config file with environment variable."""
         os.environ["PASSWORD"] = "secret_password"
         conf = "password: !env_var PASSWORD"
         with io.StringIO(conf) as file:
@@ -70,8 +70,8 @@ class TestYaml(unittest.TestCase):
             doc = yaml.yaml.safe_load(file)
         assert doc['password'] == "secret_password"
 
-    def test_invalid_enviroment_variable(self):
-        """Test config file with no enviroment variable sat."""
+    def test_invalid_environment_variable(self):
+        """Test config file with no environment variable sat."""
         conf = "password: !env_var PASSWORD"
         with self.assertRaises(HomeAssistantError):
             with io.StringIO(conf) as file: