diff --git a/.coveragerc b/.coveragerc
index 07e31e07961..b7d4b0bc68b 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -406,8 +406,6 @@ omit =
     homeassistant/components/fjaraskupan/sensor.py
     homeassistant/components/fleetgo/device_tracker.py
     homeassistant/components/flexit/climate.py
-    homeassistant/components/flexit_bacnet/__init__.py
-    homeassistant/components/flexit_bacnet/const.py
     homeassistant/components/flexit_bacnet/climate.py
     homeassistant/components/flic/binary_sensor.py
     homeassistant/components/flick_electric/__init__.py
diff --git a/homeassistant/components/flexit_bacnet/__init__.py b/homeassistant/components/flexit_bacnet/__init__.py
index c9a0b332d93..53ae1bbe775 100644
--- a/homeassistant/components/flexit_bacnet/__init__.py
+++ b/homeassistant/components/flexit_bacnet/__init__.py
@@ -25,7 +25,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
         await device.update()
     except (asyncio.exceptions.TimeoutError, ConnectionError, DecodingError) as exc:
         raise ConfigEntryNotReady(
-            f"Timeout while connecting to {entry.data['address']}"
+            f"Timeout while connecting to {entry.data[CONF_IP_ADDRESS]}"
         ) from exc
 
     hass.data.setdefault(DOMAIN, {})[entry.entry_id] = device
diff --git a/tests/components/flexit_bacnet/test_init.py b/tests/components/flexit_bacnet/test_init.py
index 35f0e04be67..71f79f54302 100644
--- a/tests/components/flexit_bacnet/test_init.py
+++ b/tests/components/flexit_bacnet/test_init.py
@@ -1,5 +1,7 @@
 """Tests for the Flexit Nordic (BACnet) __init__."""
-from homeassistant.components.flexit_bacnet.const import DOMAIN as FLEXIT_BACNET_DOMAIN
+from flexit_bacnet import DecodingError
+
+from homeassistant.components.flexit_bacnet.const import DOMAIN
 from homeassistant.config_entries import ConfigEntryState
 from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
@@ -14,11 +16,20 @@ async def test_loading_and_unloading_config_entry(
     """Test loading and unloading a config entry."""
     await setup_with_selected_platforms(hass, mock_config_entry, [Platform.CLIMATE])
 
-    assert len(hass.config_entries.async_entries(FLEXIT_BACNET_DOMAIN)) == 1
+    assert len(hass.config_entries.async_entries(DOMAIN)) == 1
     assert mock_config_entry.state == ConfigEntryState.LOADED
 
     assert await hass.config_entries.async_unload(mock_config_entry.entry_id)
     await hass.async_block_till_done()
 
     assert mock_config_entry.state is ConfigEntryState.NOT_LOADED
-    assert not hass.data.get(FLEXIT_BACNET_DOMAIN)
+
+
+async def test_failed_initialization(
+    hass: HomeAssistant, mock_config_entry: MockConfigEntry, mock_flexit_bacnet
+) -> None:
+    """Test failed initialization."""
+    mock_flexit_bacnet.update.side_effect = DecodingError
+    mock_config_entry.add_to_hass(hass)
+    assert not await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    assert mock_config_entry.state == ConfigEntryState.SETUP_RETRY