diff --git a/tests/components/wallbox/__init__.py b/tests/components/wallbox/__init__.py
index d9bf9cfceaf..40f55db8d50 100644
--- a/tests/components/wallbox/__init__.py
+++ b/tests/components/wallbox/__init__.py
@@ -29,28 +29,24 @@ from .const import ERROR, STATUS, TTL, USER_ID
 
 from tests.common import MockConfigEntry
 
-test_response = json.loads(
-    json.dumps(
-        {
-            CHARGER_CHARGING_POWER_KEY: 0,
-            CHARGER_STATUS_ID_KEY: 193,
-            CHARGER_MAX_AVAILABLE_POWER_KEY: 25.0,
-            CHARGER_CHARGING_SPEED_KEY: 0,
-            CHARGER_ADDED_RANGE_KEY: 150,
-            CHARGER_ADDED_ENERGY_KEY: 44.697,
-            CHARGER_NAME_KEY: "WallboxName",
-            CHARGER_DATA_KEY: {
-                CHARGER_MAX_CHARGING_CURRENT_KEY: 24,
-                CHARGER_ENERGY_PRICE_KEY: 0.4,
-                CHARGER_LOCKED_UNLOCKED_KEY: False,
-                CHARGER_SERIAL_NUMBER_KEY: "20000",
-                CHARGER_PART_NUMBER_KEY: "PLP1-0-2-4-9-002-E",
-                CHARGER_SOFTWARE_KEY: {CHARGER_CURRENT_VERSION_KEY: "5.5.10"},
-                CHARGER_CURRENCY_KEY: {"code": "EUR/kWh"},
-            },
-        }
-    )
-)
+test_response = {
+    CHARGER_CHARGING_POWER_KEY: 0,
+    CHARGER_STATUS_ID_KEY: 193,
+    CHARGER_MAX_AVAILABLE_POWER_KEY: 25.0,
+    CHARGER_CHARGING_SPEED_KEY: 0,
+    CHARGER_ADDED_RANGE_KEY: 150,
+    CHARGER_ADDED_ENERGY_KEY: 44.697,
+    CHARGER_NAME_KEY: "WallboxName",
+    CHARGER_DATA_KEY: {
+        CHARGER_MAX_CHARGING_CURRENT_KEY: 24,
+        CHARGER_ENERGY_PRICE_KEY: 0.4,
+        CHARGER_LOCKED_UNLOCKED_KEY: False,
+        CHARGER_SERIAL_NUMBER_KEY: "20000",
+        CHARGER_PART_NUMBER_KEY: "PLP1-0-2-4-9-002-E",
+        CHARGER_SOFTWARE_KEY: {CHARGER_CURRENT_VERSION_KEY: "5.5.10"},
+        CHARGER_CURRENCY_KEY: {"code": "EUR/kWh"},
+    },
+}
 
 test_response_bidir = {
     CHARGER_CHARGING_POWER_KEY: 0,
@@ -72,38 +68,30 @@ test_response_bidir = {
 }
 
 
-authorisation_response = json.loads(
-    json.dumps(
-        {
-            "data": {
-                "attributes": {
-                    "token": "fakekeyhere",
-                    USER_ID: 12345,
-                    TTL: 145656758,
-                    ERROR: "false",
-                    STATUS: 200,
-                }
-            }
+authorisation_response = {
+    "data": {
+        "attributes": {
+            "token": "fakekeyhere",
+            USER_ID: 12345,
+            TTL: 145656758,
+            ERROR: "false",
+            STATUS: 200,
         }
-    )
-)
+    }
+}
 
 
-authorisation_response_unauthorised = json.loads(
-    json.dumps(
-        {
-            "data": {
-                "attributes": {
-                    "token": "fakekeyhere",
-                    USER_ID: 12345,
-                    TTL: 145656758,
-                    ERROR: "false",
-                    STATUS: 404,
-                }
-            }
+authorisation_response_unauthorised = {
+    "data": {
+        "attributes": {
+            "token": "fakekeyhere",
+            USER_ID: 12345,
+            TTL: 145656758,
+            ERROR: "false",
+            STATUS: 404,
         }
-    )
-)
+    }
+}
 
 
 async def setup_integration(hass: HomeAssistant, entry: MockConfigEntry) -> None:
diff --git a/tests/components/wallbox/test_init.py b/tests/components/wallbox/test_init.py
index 0091ce9ffdc..93082737f1f 100644
--- a/tests/components/wallbox/test_init.py
+++ b/tests/components/wallbox/test_init.py
@@ -45,6 +45,34 @@ async def test_wallbox_unload_entry_connection_error(
     assert entry.state == ConfigEntryState.NOT_LOADED
 
 
+async def test_wallbox_refresh_failed_connection_error_auth(
+    hass: HomeAssistant, entry: MockConfigEntry
+) -> None:
+    """Test Wallbox setup with connection error."""
+
+    await setup_integration(hass, entry)
+    assert entry.state == ConfigEntryState.LOADED
+
+    with requests_mock.Mocker() as mock_request:
+        mock_request.get(
+            "https://user-api.wall-box.com/users/signin",
+            json=authorisation_response,
+            status_code=404,
+        )
+        mock_request.get(
+            "https://api.wall-box.com/chargers/status/12345",
+            json=test_response,
+            status_code=200,
+        )
+
+        wallbox = hass.data[DOMAIN][entry.entry_id]
+
+        await wallbox.async_refresh()
+
+    assert await hass.config_entries.async_unload(entry.entry_id)
+    assert entry.state == ConfigEntryState.NOT_LOADED
+
+
 async def test_wallbox_refresh_failed_invalid_auth(
     hass: HomeAssistant, entry: MockConfigEntry
 ) -> None: