diff --git a/homeassistant/components/tessie/config_flow.py b/homeassistant/components/tessie/config_flow.py
index 4379a810309..3e3207b264b 100644
--- a/homeassistant/components/tessie/config_flow.py
+++ b/homeassistant/components/tessie/config_flow.py
@@ -81,7 +81,7 @@ class TessieConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
                 )
             except ClientResponseError as e:
                 if e.status == HTTPStatus.UNAUTHORIZED:
-                    errors["base"] = "invalid_access_token"
+                    errors[CONF_ACCESS_TOKEN] = "invalid_access_token"
                 else:
                     errors["base"] = "unknown"
             except ClientConnectionError:
diff --git a/tests/components/tessie/conftest.py b/tests/components/tessie/conftest.py
new file mode 100644
index 00000000000..c7a344d54c5
--- /dev/null
+++ b/tests/components/tessie/conftest.py
@@ -0,0 +1,28 @@
+"""Fixtures for Tessie."""
+from __future__ import annotations
+
+from unittest.mock import patch
+
+import pytest
+
+from .common import TEST_STATE_OF_ALL_VEHICLES, TEST_VEHICLE_STATE_ONLINE
+
+
+@pytest.fixture
+def mock_get_state():
+    """Mock get_state function."""
+    with patch(
+        "homeassistant.components.tessie.coordinator.get_state",
+        return_value=TEST_VEHICLE_STATE_ONLINE,
+    ) as mock_get_state:
+        yield mock_get_state
+
+
+@pytest.fixture
+def mock_get_state_of_all_vehicles():
+    """Mock get_state_of_all_vehicles function."""
+    with patch(
+        "homeassistant.components.tessie.config_flow.get_state_of_all_vehicles",
+        return_value=TEST_STATE_OF_ALL_VEHICLES,
+    ) as mock_get_state_of_all_vehicles:
+        yield mock_get_state_of_all_vehicles
diff --git a/tests/components/tessie/test_config_flow.py b/tests/components/tessie/test_config_flow.py
index d1977a13193..182468e200c 100644
--- a/tests/components/tessie/test_config_flow.py
+++ b/tests/components/tessie/test_config_flow.py
@@ -15,24 +15,13 @@ from .common import (
     ERROR_CONNECTION,
     ERROR_UNKNOWN,
     TEST_CONFIG,
-    TEST_STATE_OF_ALL_VEHICLES,
     setup_platform,
 )
 
 from tests.common import MockConfigEntry
 
 
-@pytest.fixture
-def mock_get_state_of_all_vehicles():
-    """Mock get_state_of_all_vehicles function."""
-    with patch(
-        "homeassistant.components.tessie.config_flow.get_state_of_all_vehicles",
-        return_value=TEST_STATE_OF_ALL_VEHICLES,
-    ) as mock_get_state_of_all_vehicles:
-        yield mock_get_state_of_all_vehicles
-
-
-async def test_form(hass: HomeAssistant) -> None:
+async def test_form(hass: HomeAssistant, mock_get_state_of_all_vehicles) -> None:
     """Test we get the form."""
 
     result1 = await hass.config_entries.flow.async_init(
@@ -42,9 +31,6 @@ async def test_form(hass: HomeAssistant) -> None:
     assert not result1["errors"]
 
     with patch(
-        "homeassistant.components.tessie.config_flow.get_state_of_all_vehicles",
-        return_value=TEST_STATE_OF_ALL_VEHICLES,
-    ) as mock_get_state_of_all_vehicles, patch(
         "homeassistant.components.tessie.async_setup_entry",
         return_value=True,
     ) as mock_setup_entry:
@@ -61,96 +47,38 @@ async def test_form(hass: HomeAssistant) -> None:
     assert result2["data"] == TEST_CONFIG
 
 
-async def test_form_invalid_access_token(hass: HomeAssistant) -> None:
+@pytest.mark.parametrize(
+    ("side_effect", "error"),
+    [
+        (ERROR_AUTH, {CONF_ACCESS_TOKEN: "invalid_access_token"}),
+        (ERROR_UNKNOWN, {"base": "unknown"}),
+        (ERROR_CONNECTION, {"base": "cannot_connect"}),
+    ],
+)
+async def test_form_errors(
+    hass: HomeAssistant, side_effect, error, mock_get_state_of_all_vehicles
+) -> None:
     """Test invalid auth is handled."""
 
     result1 = await hass.config_entries.flow.async_init(
         DOMAIN, context={"source": config_entries.SOURCE_USER}
     )
 
-    with patch(
-        "homeassistant.components.tessie.config_flow.get_state_of_all_vehicles",
-        side_effect=ERROR_AUTH,
-    ):
-        result2 = await hass.config_entries.flow.async_configure(
-            result1["flow_id"],
-            TEST_CONFIG,
-        )
-
-    assert result2["type"] == FlowResultType.FORM
-    assert result2["errors"] == {CONF_ACCESS_TOKEN: "invalid_access_token"}
-
-    # Complete the flow
-    with patch(
-        "homeassistant.components.tessie.config_flow.get_state_of_all_vehicles",
-        return_value=TEST_STATE_OF_ALL_VEHICLES,
-    ):
-        result3 = await hass.config_entries.flow.async_configure(
-            result2["flow_id"],
-            TEST_CONFIG,
-        )
-    assert result3["type"] == FlowResultType.CREATE_ENTRY
-
-
-async def test_form_invalid_response(hass: HomeAssistant) -> None:
-    """Test invalid auth is handled."""
-
-    result1 = await hass.config_entries.flow.async_init(
-        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    mock_get_state_of_all_vehicles.side_effect = side_effect
+    result2 = await hass.config_entries.flow.async_configure(
+        result1["flow_id"],
+        TEST_CONFIG,
     )
 
-    with patch(
-        "homeassistant.components.tessie.config_flow.get_state_of_all_vehicles",
-        side_effect=ERROR_UNKNOWN,
-    ):
-        result2 = await hass.config_entries.flow.async_configure(
-            result1["flow_id"],
-            TEST_CONFIG,
-        )
-
     assert result2["type"] == FlowResultType.FORM
-    assert result2["errors"] == {"base": "unknown"}
+    assert result2["errors"] == error
 
     # Complete the flow
-    with patch(
-        "homeassistant.components.tessie.config_flow.get_state_of_all_vehicles",
-        return_value=TEST_STATE_OF_ALL_VEHICLES,
-    ):
-        result3 = await hass.config_entries.flow.async_configure(
-            result2["flow_id"],
-            TEST_CONFIG,
-        )
-    assert result3["type"] == FlowResultType.CREATE_ENTRY
-
-
-async def test_form_network_issue(hass: HomeAssistant) -> None:
-    """Test network issues are handled."""
-
-    result1 = await hass.config_entries.flow.async_init(
-        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    mock_get_state_of_all_vehicles.side_effect = None
+    result3 = await hass.config_entries.flow.async_configure(
+        result2["flow_id"],
+        TEST_CONFIG,
     )
-
-    with patch(
-        "homeassistant.components.tessie.config_flow.get_state_of_all_vehicles",
-        side_effect=ERROR_CONNECTION,
-    ):
-        result2 = await hass.config_entries.flow.async_configure(
-            result1["flow_id"],
-            TEST_CONFIG,
-        )
-
-    assert result2["type"] == FlowResultType.FORM
-    assert result2["errors"] == {"base": "cannot_connect"}
-
-    # Complete the flow
-    with patch(
-        "homeassistant.components.tessie.config_flow.get_state_of_all_vehicles",
-        return_value=TEST_STATE_OF_ALL_VEHICLES,
-    ):
-        result3 = await hass.config_entries.flow.async_configure(
-            result2["flow_id"],
-            TEST_CONFIG,
-        )
     assert result3["type"] == FlowResultType.CREATE_ENTRY
 
 
@@ -196,7 +124,7 @@ async def test_reauth(hass: HomeAssistant, mock_get_state_of_all_vehicles) -> No
 @pytest.mark.parametrize(
     ("side_effect", "error"),
     [
-        (ERROR_AUTH, {"base": "invalid_access_token"}),
+        (ERROR_AUTH, {CONF_ACCESS_TOKEN: "invalid_access_token"}),
         (ERROR_UNKNOWN, {"base": "unknown"}),
         (ERROR_CONNECTION, {"base": "cannot_connect"}),
     ],
diff --git a/tests/components/tessie/test_coordinator.py b/tests/components/tessie/test_coordinator.py
index 8fe92454c36..50a9f2f7733 100644
--- a/tests/components/tessie/test_coordinator.py
+++ b/tests/components/tessie/test_coordinator.py
@@ -1,8 +1,5 @@
 """Test the Tessie sensor platform."""
 from datetime import timedelta
-from unittest.mock import patch
-
-import pytest
 
 from homeassistant.components.tessie.coordinator import TESSIE_SYNC_INTERVAL
 from homeassistant.components.tessie.sensor import TessieStatus
@@ -25,15 +22,6 @@ from tests.common import async_fire_time_changed
 WAIT = timedelta(seconds=TESSIE_SYNC_INTERVAL)
 
 
-@pytest.fixture
-def mock_get_state():
-    """Mock get_state function."""
-    with patch(
-        "homeassistant.components.tessie.coordinator.get_state",
-    ) as mock_get_state:
-        yield mock_get_state
-
-
 async def test_coordinator_online(hass: HomeAssistant, mock_get_state) -> None:
     """Tests that the coordinator handles online vehciles."""