diff --git a/homeassistant/components/nuheat/__init__.py b/homeassistant/components/nuheat/__init__.py
index ff90bb26530..ca47f831370 100644
--- a/homeassistant/components/nuheat/__init__.py
+++ b/homeassistant/components/nuheat/__init__.py
@@ -78,7 +78,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry):
     except requests.exceptions.Timeout:
         raise ConfigEntryNotReady
     except requests.exceptions.HTTPError as ex:
-        if ex.request.status_code > 400 and ex.request.status_code < 500:
+        if ex.response.status_code > 400 and ex.response.status_code < 500:
             _LOGGER.error("Failed to login to nuheat: %s", ex)
             return False
         raise ConfigEntryNotReady
diff --git a/homeassistant/components/nuheat/config_flow.py b/homeassistant/components/nuheat/config_flow.py
index 082cb899ec5..4f12f590057 100644
--- a/homeassistant/components/nuheat/config_flow.py
+++ b/homeassistant/components/nuheat/config_flow.py
@@ -34,7 +34,7 @@ async def validate_input(hass: core.HomeAssistant, data):
     except requests.exceptions.Timeout:
         raise CannotConnect
     except requests.exceptions.HTTPError as ex:
-        if ex.request.status_code > 400 and ex.request.status_code < 500:
+        if ex.response.status_code > 400 and ex.response.status_code < 500:
             raise InvalidAuth
         raise CannotConnect
     #
diff --git a/tests/components/nuheat/test_config_flow.py b/tests/components/nuheat/test_config_flow.py
index 95987404e44..d6e10e1dc7c 100644
--- a/tests/components/nuheat/test_config_flow.py
+++ b/tests/components/nuheat/test_config_flow.py
@@ -1,5 +1,5 @@
 """Test the NuHeat config flow."""
-from asynctest import patch
+from asynctest import MagicMock, patch
 import requests
 
 from homeassistant import config_entries, setup
@@ -100,6 +100,24 @@ async def test_form_invalid_auth(hass):
     with patch(
         "homeassistant.components.nuheat.config_flow.nuheat.NuHeat.authenticate",
         side_effect=Exception,
+    ):
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            {
+                CONF_SERIAL_NUMBER: "12345",
+                CONF_USERNAME: "test-username",
+                CONF_PASSWORD: "test-password",
+            },
+        )
+
+    assert result["type"] == "form"
+    assert result["errors"] == {"base": "invalid_auth"}
+
+    response_mock = MagicMock()
+    type(response_mock).status_code = 401
+    with patch(
+        "homeassistant.components.nuheat.config_flow.nuheat.NuHeat.authenticate",
+        side_effect=requests.HTTPError(response=response_mock),
     ):
         result2 = await hass.config_entries.flow.async_configure(
             result["flow_id"],
@@ -120,12 +138,15 @@ async def test_form_invalid_thermostat(hass):
         DOMAIN, context={"source": config_entries.SOURCE_USER}
     )
 
+    response_mock = MagicMock()
+    type(response_mock).status_code = 500
+
     with patch(
         "homeassistant.components.nuheat.config_flow.nuheat.NuHeat.authenticate",
         return_value=True,
     ), patch(
         "homeassistant.components.nuheat.config_flow.nuheat.NuHeat.get_thermostat",
-        side_effect=requests.exceptions.HTTPError,
+        side_effect=requests.HTTPError(response=response_mock),
     ):
         result2 = await hass.config_entries.flow.async_configure(
             result["flow_id"],