diff --git a/.gitignore b/.gitignore
index 15f0896975da36..2473aeb4bf650d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -128,3 +128,6 @@ monkeytype.sqlite3
 
 # This is left behind by Azure Restore Cache
 tmp_cache
+
+# python-language-server / Rope
+.ropeproject
diff --git a/homeassistant/components/wake_on_lan/__init__.py b/homeassistant/components/wake_on_lan/__init__.py
index 421f6265c0c4b0..b4aad4925b9986 100644
--- a/homeassistant/components/wake_on_lan/__init__.py
+++ b/homeassistant/components/wake_on_lan/__init__.py
@@ -3,6 +3,7 @@
 import logging
 
 import voluptuous as vol
+import wakeonlan
 
 from homeassistant.const import CONF_MAC
 import homeassistant.helpers.config_validation as cv
@@ -22,7 +23,6 @@
 
 async def async_setup(hass, config):
     """Set up the wake on LAN component."""
-    import wakeonlan
 
     async def send_magic_packet(call):
         """Send magic packet to wake up a device."""
diff --git a/homeassistant/components/wake_on_lan/switch.py b/homeassistant/components/wake_on_lan/switch.py
index 453685b13f60d6..01f69679829677 100644
--- a/homeassistant/components/wake_on_lan/switch.py
+++ b/homeassistant/components/wake_on_lan/switch.py
@@ -4,6 +4,7 @@
 import subprocess as sp
 
 import voluptuous as vol
+import wakeonlan
 
 from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchDevice
 from homeassistant.const import CONF_HOST, CONF_NAME
@@ -48,8 +49,6 @@ class WOLSwitch(SwitchDevice):
 
     def __init__(self, hass, name, host, mac_address, off_action, broadcast_address):
         """Initialize the WOL switch."""
-        import wakeonlan
-
         self._hass = hass
         self._name = name
         self._host = host
@@ -57,7 +56,6 @@ def __init__(self, hass, name, host, mac_address, off_action, broadcast_address)
         self._broadcast_address = broadcast_address
         self._off_script = Script(hass, off_action) if off_action else None
         self._state = False
-        self._wol = wakeonlan
 
     @property
     def is_on(self):
@@ -72,11 +70,11 @@ def name(self):
     def turn_on(self, **kwargs):
         """Turn the device on."""
         if self._broadcast_address:
-            self._wol.send_magic_packet(
+            wakeonlan.send_magic_packet(
                 self._mac_address, ip_address=self._broadcast_address
             )
         else:
-            self._wol.send_magic_packet(self._mac_address)
+            wakeonlan.send_magic_packet(self._mac_address)
 
     def turn_off(self, **kwargs):
         """Turn the device off if an off action is present."""
diff --git a/tests/components/wake_on_lan/test_init.py b/tests/components/wake_on_lan/test_init.py
index d71f15e610978b..c2ee0930895e17 100644
--- a/tests/components/wake_on_lan/test_init.py
+++ b/tests/components/wake_on_lan/test_init.py
@@ -1,52 +1,46 @@
 """Tests for Wake On LAN component."""
-import asyncio
-from unittest import mock
-
 import pytest
 import voluptuous as vol
 
-from homeassistant.setup import async_setup_component
+from homeassistant.components import wake_on_lan
 from homeassistant.components.wake_on_lan import DOMAIN, SERVICE_SEND_MAGIC_PACKET
+from homeassistant.setup import async_setup_component
 
-
-@pytest.fixture
-def mock_wakeonlan():
-    """Mock mock_wakeonlan."""
-    module = mock.MagicMock()
-    with mock.patch.dict("sys.modules", {"wakeonlan": module}):
-        yield module
+from tests.common import MockDependency
 
 
-@asyncio.coroutine
-def test_send_magic_packet(hass, caplog, mock_wakeonlan):
+async def test_send_magic_packet(hass):
     """Test of send magic packet service call."""
-    mac = "aa:bb:cc:dd:ee:ff"
-    bc_ip = "192.168.255.255"
-
-    yield from async_setup_component(hass, DOMAIN, {})
-
-    yield from hass.services.async_call(
-        DOMAIN,
-        SERVICE_SEND_MAGIC_PACKET,
-        {"mac": mac, "broadcast_address": bc_ip},
-        blocking=True,
-    )
-    assert len(mock_wakeonlan.mock_calls) == 1
-    assert mock_wakeonlan.mock_calls[-1][1][0] == mac
-    assert mock_wakeonlan.mock_calls[-1][2]["ip_address"] == bc_ip
-
-    with pytest.raises(vol.Invalid):
-        yield from hass.services.async_call(
+    with MockDependency("wakeonlan") as mocked_wakeonlan:
+        mac = "aa:bb:cc:dd:ee:ff"
+        bc_ip = "192.168.255.255"
+
+        wake_on_lan.wakeonlan = mocked_wakeonlan
+
+        await async_setup_component(hass, DOMAIN, {})
+
+        await hass.services.async_call(
             DOMAIN,
             SERVICE_SEND_MAGIC_PACKET,
-            {"broadcast_address": bc_ip},
+            {"mac": mac, "broadcast_address": bc_ip},
             blocking=True,
         )
-    assert len(mock_wakeonlan.mock_calls) == 1
-
-    yield from hass.services.async_call(
-        DOMAIN, SERVICE_SEND_MAGIC_PACKET, {"mac": mac}, blocking=True
-    )
-    assert len(mock_wakeonlan.mock_calls) == 2
-    assert mock_wakeonlan.mock_calls[-1][1][0] == mac
-    assert not mock_wakeonlan.mock_calls[-1][2]
+        assert len(mocked_wakeonlan.mock_calls) == 1
+        assert mocked_wakeonlan.mock_calls[-1][1][0] == mac
+        assert mocked_wakeonlan.mock_calls[-1][2]["ip_address"] == bc_ip
+
+        with pytest.raises(vol.Invalid):
+            await hass.services.async_call(
+                DOMAIN,
+                SERVICE_SEND_MAGIC_PACKET,
+                {"broadcast_address": bc_ip},
+                blocking=True,
+            )
+        assert len(mocked_wakeonlan.mock_calls) == 1
+
+        await hass.services.async_call(
+            DOMAIN, SERVICE_SEND_MAGIC_PACKET, {"mac": mac}, blocking=True
+        )
+        assert len(mocked_wakeonlan.mock_calls) == 2
+        assert mocked_wakeonlan.mock_calls[-1][1][0] == mac
+        assert not mocked_wakeonlan.mock_calls[-1][2]