diff --git a/homeassistant/components/hue/config_flow.py b/homeassistant/components/hue/config_flow.py
index f16d1f74cf6..ecb3fd8c489 100644
--- a/homeassistant/components/hue/config_flow.py
+++ b/homeassistant/components/hue/config_flow.py
@@ -122,7 +122,7 @@ class HueFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
             )
 
         if any(
-            user_input["host"] == entry.data["host"]
+            user_input["host"] == entry.data.get("host")
             for entry in self._async_current_entries()
         ):
             return self.async_abort(reason="already_configured")
@@ -216,7 +216,7 @@ class HueFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
         """
         # Check if host exists, abort if so.
         if any(
-            import_info["host"] == entry.data["host"]
+            import_info["host"] == entry.data.get("host")
             for entry in self._async_current_entries()
         ):
             return self.async_abort(reason="already_configured")
diff --git a/homeassistant/components/progettihwsw/config_flow.py b/homeassistant/components/progettihwsw/config_flow.py
index e65b58b370a..dca29668a84 100644
--- a/homeassistant/components/progettihwsw/config_flow.py
+++ b/homeassistant/components/progettihwsw/config_flow.py
@@ -19,7 +19,8 @@ async def validate_input(hass: core.HomeAssistant, data):
     same_entries = [
         True
         for entry in confs
-        if entry.data["host"] == data["host"] and entry.data["port"] == data["port"]
+        if entry.data.get("host") == data["host"]
+        and entry.data.get("port") == data["port"]
     ]
 
     if same_entries:
diff --git a/homeassistant/components/tradfri/__init__.py b/homeassistant/components/tradfri/__init__.py
index 3a89852a55e..8d82df07bbb 100644
--- a/homeassistant/components/tradfri/__init__.py
+++ b/homeassistant/components/tradfri/__init__.py
@@ -64,7 +64,7 @@ async def async_setup(hass: HomeAssistantType, config: ConfigType):
         return True
 
     configured_hosts = [
-        entry.data["host"] for entry in hass.config_entries.async_entries(DOMAIN)
+        entry.data.get("host") for entry in hass.config_entries.async_entries(DOMAIN)
     ]
 
     legacy_hosts = await hass.async_add_executor_job(
diff --git a/tests/components/hue/test_config_flow.py b/tests/components/hue/test_config_flow.py
index 21bb489ffe7..a551e623e63 100644
--- a/tests/components/hue/test_config_flow.py
+++ b/tests/components/hue/test_config_flow.py
@@ -92,6 +92,10 @@ async def test_manual_flow_works(hass, aioclient_mock):
     """Test config flow discovers only already configured bridges."""
     mock_bridge = get_mock_bridge()
 
+    MockConfigEntry(
+        domain="hue", source=config_entries.SOURCE_IGNORE, unique_id="bla"
+    ).add_to_hass(hass)
+
     with patch(
         "homeassistant.components.hue.config_flow.discover_nupnp",
         return_value=[mock_bridge],
@@ -137,7 +141,7 @@ async def test_manual_flow_works(hass, aioclient_mock):
         "username": "username-abc",
     }
     entries = hass.config_entries.async_entries("hue")
-    assert len(entries) == 1
+    assert len(entries) == 2
     entry = entries[-1]
     assert entry.unique_id == "id-1234"