diff --git a/homeassistant/components/asuswrt/__init__.py b/homeassistant/components/asuswrt/__init__.py
index a0afbed69f1..a0eee38c3f8 100644
--- a/homeassistant/components/asuswrt/__init__.py
+++ b/homeassistant/components/asuswrt/__init__.py
@@ -51,7 +51,7 @@ CONFIG_SCHEMA = vol.Schema(
                     cv.ensure_list, [vol.In(SENSOR_TYPES)]
                 ),
                 vol.Optional(CONF_INTERFACE, default=DEFAULT_INTERFACE): cv.string,
-                vol.Optional(CONF_DNSMASQ, default=DEFAULT_DNSMASQ): cv.isdir,
+                vol.Optional(CONF_DNSMASQ, default=DEFAULT_DNSMASQ): cv.string,
             }
         )
     },
diff --git a/tests/components/asuswrt/test_device_tracker.py b/tests/components/asuswrt/test_device_tracker.py
index 095b7b76d60..b91b815d58e 100644
--- a/tests/components/asuswrt/test_device_tracker.py
+++ b/tests/components/asuswrt/test_device_tracker.py
@@ -19,9 +19,7 @@ async def test_password_or_pub_key_required(hass):
         AsusWrt().connection.async_connect = mock_coro_func()
         AsusWrt().is_connected = False
         result = await async_setup_component(
-            hass,
-            DOMAIN,
-            {DOMAIN: {CONF_HOST: "fake_host", CONF_USERNAME: "fake_user"}},
+            hass, DOMAIN, {DOMAIN: {CONF_HOST: "fake_host", CONF_USERNAME: "fake_user"}}
         )
         assert not result
 
@@ -62,7 +60,7 @@ async def test_specify_non_directory_path_for_dnsmasq(hass):
                     CONF_HOST: "fake_host",
                     CONF_USERNAME: "fake_user",
                     CONF_PASSWORD: "4321",
-                    CONF_DNSMASQ: "?non_directory?",
+                    CONF_DNSMASQ: 1234,
                 }
             },
         )