diff --git a/homeassistant/components/tedee/strings.json b/homeassistant/components/tedee/strings.json
index 2dc0e23968c..b6966fa2933 100644
--- a/homeassistant/components/tedee/strings.json
+++ b/homeassistant/components/tedee/strings.json
@@ -38,7 +38,8 @@
     "abort": {
       "already_configured": "[%key:common::config_flow::abort::already_configured_device%]",
       "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
-      "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]"
+      "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]",
+      "unique_id_mismatch": "You selected a different bridge than the one this config entry was configured with, this is not allowed."
     },
     "error": {
       "invalid_api_key": "[%key:common::config_flow::error::invalid_api_key%]",
diff --git a/tests/components/tedee/test_config_flow.py b/tests/components/tedee/test_config_flow.py
index d3654783bd6..2e86286c8da 100644
--- a/tests/components/tedee/test_config_flow.py
+++ b/tests/components/tedee/test_config_flow.py
@@ -7,10 +7,11 @@ from pytedee_async import (
     TedeeDataUpdateException,
     TedeeLocalAuthException,
 )
+from pytedee_async.bridge import TedeeBridge
 import pytest
 
 from homeassistant.components.tedee.const import CONF_LOCAL_ACCESS_TOKEN, DOMAIN
-from homeassistant.config_entries import SOURCE_USER
+from homeassistant.config_entries import SOURCE_USER, ConfigFlowResult
 from homeassistant.const import CONF_HOST, CONF_WEBHOOK_ID
 from homeassistant.core import HomeAssistant
 from homeassistant.data_entry_flow import FlowResultType
@@ -134,11 +135,10 @@ async def test_reauth_flow(
     assert result["reason"] == "reauth_successful"
 
 
-async def test_reconfigure_flow(
-    hass: HomeAssistant, mock_config_entry: MockConfigEntry, mock_tedee: MagicMock
-) -> None:
-    """Test that the reconfigure flow works."""
-
+async def __do_reconfigure_flow(
+    hass: HomeAssistant, mock_config_entry: MockConfigEntry
+) -> ConfigFlowResult:
+    """Initialize a reconfigure flow."""
     mock_config_entry.add_to_hass(hass)
 
     reconfigure_result = await mock_config_entry.start_reconfigure_flow(hass)
@@ -146,11 +146,19 @@ async def test_reconfigure_flow(
     assert reconfigure_result["type"] is FlowResultType.FORM
     assert reconfigure_result["step_id"] == "reconfigure"
 
-    result = await hass.config_entries.flow.async_configure(
+    return await hass.config_entries.flow.async_configure(
         reconfigure_result["flow_id"],
         {CONF_LOCAL_ACCESS_TOKEN: LOCAL_ACCESS_TOKEN, CONF_HOST: "192.168.1.43"},
     )
 
+
+async def test_reconfigure_flow(
+    hass: HomeAssistant, mock_config_entry: MockConfigEntry, mock_tedee: MagicMock
+) -> None:
+    """Test that the reconfigure flow works."""
+
+    result = await __do_reconfigure_flow(hass, mock_config_entry)
+
     assert result["type"] is FlowResultType.ABORT
     assert result["reason"] == "reconfigure_successful"
 
@@ -162,3 +170,18 @@ async def test_reconfigure_flow(
         CONF_LOCAL_ACCESS_TOKEN: LOCAL_ACCESS_TOKEN,
         CONF_WEBHOOK_ID: WEBHOOK_ID,
     }
+
+
+async def test_reconfigure_unique_id_mismatch(
+    hass: HomeAssistant, mock_config_entry: MockConfigEntry, mock_tedee: MagicMock
+) -> None:
+    """Ensure reconfigure flow aborts when the bride changes."""
+
+    mock_tedee.get_local_bridge.return_value = TedeeBridge(
+        0, "1111-1111", "Bridge-R2D2"
+    )
+
+    result = await __do_reconfigure_flow(hass, mock_config_entry)
+
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "unique_id_mismatch"