diff --git a/homeassistant/components/harmony/util.py b/homeassistant/components/harmony/util.py
index 69ed44cb7da..412aa2c6940 100644
--- a/homeassistant/components/harmony/util.py
+++ b/homeassistant/components/harmony/util.py
@@ -11,7 +11,7 @@ def find_unique_id_for_remote(harmony: HarmonyAPI):
     """Find the unique id for both websocket and xmpp clients."""
     websocket_unique_id = harmony.hub_config.info.get("activeRemoteId")
     if websocket_unique_id is not None:
-        return websocket_unique_id
+        return str(websocket_unique_id)
 
     # fallback to the xmpp unique id if websocket is not available
     return harmony.config["global"]["timeStampHash"].split(";")[-1]
diff --git a/tests/components/config/test_group.py b/tests/components/config/test_group.py
index 49d168e2796..d00e0317e9e 100644
--- a/tests/components/config/test_group.py
+++ b/tests/components/config/test_group.py
@@ -1,6 +1,8 @@
 """Test Group config panel."""
 import json
-from unittest.mock import MagicMock, patch
+from unittest.mock import patch
+
+from asynctest import CoroutineMock
 
 from homeassistant.bootstrap import async_setup_component
 from homeassistant.components import config
@@ -50,7 +52,7 @@ async def test_update_device_config(hass, hass_client):
         """Mock writing data."""
         written.append(data)
 
-    mock_call = MagicMock()
+    mock_call = CoroutineMock()
 
     with patch("homeassistant.components.config._read", mock_read), patch(
         "homeassistant.components.config._write", mock_write
diff --git a/tests/components/default_config/test_init.py b/tests/components/default_config/test_init.py
index 2ec3467e0db..8e0862eb0cb 100644
--- a/tests/components/default_config/test_init.py
+++ b/tests/components/default_config/test_init.py
@@ -15,4 +15,4 @@ def recorder_url_mock():
 
 async def test_setup(hass):
     """Test setup."""
-    assert await async_setup_component(hass, "default_config", {})
+    assert await async_setup_component(hass, "default_config", {"foo": "bar"})
diff --git a/tests/ignore_uncaught_exceptions.py b/tests/ignore_uncaught_exceptions.py
index 64710242132..f4720db25ee 100644
--- a/tests/ignore_uncaught_exceptions.py
+++ b/tests/ignore_uncaught_exceptions.py
@@ -4,8 +4,6 @@ IGNORE_UNCAUGHT_EXCEPTIONS = [
     ("tests.components.cast.test_media_player", "test_entry_setup_single_config"),
     ("tests.components.cast.test_media_player", "test_entry_setup_list_config"),
     ("tests.components.cast.test_media_player", "test_entry_setup_platform_not_ready"),
-    ("tests.components.config.test_group", "test_update_device_config"),
-    ("tests.components.default_config.test_init", "test_setup"),
     ("tests.components.demo.test_init", "test_setting_up_demo"),
     ("tests.components.discovery.test_init", "test_discover_config_flow"),
     ("tests.components.dyson.test_air_quality", "test_purecool_aiq_attributes"),
@@ -58,7 +56,4 @@ IGNORE_UNCAUGHT_JSON_EXCEPTIONS = [
         "tests.components.smartthings.test_init",
         "test_config_entry_loads_unconnected_cloud",
     ),
-    ("tests.components.harmony.test_config_flow", "test_form_import"),
-    ("tests.components.harmony.test_config_flow", "test_form_ssdp"),
-    ("tests.components.harmony.test_config_flow", "test_user_form"),
 ]