diff --git a/homeassistant/components/nest/config_flow.py b/homeassistant/components/nest/config_flow.py
index 479a54edbc7..2e89f7970fa 100644
--- a/homeassistant/components/nest/config_flow.py
+++ b/homeassistant/components/nest/config_flow.py
@@ -11,7 +11,7 @@ from __future__ import annotations
 
 import asyncio
 from collections import OrderedDict
-from collections.abc import Iterable
+from collections.abc import Iterable, Mapping
 from enum import Enum
 import logging
 import os
@@ -218,14 +218,9 @@ class NestFlowHandler(
             return await self.async_step_finish()
         return await self.async_step_pubsub()
 
-    async def async_step_reauth(
-        self, user_input: dict[str, Any] | None = None
-    ) -> FlowResult:
+    async def async_step_reauth(self, user_input: Mapping[str, Any]) -> FlowResult:
         """Perform reauth upon an API authentication error."""
         assert self.config_mode != ConfigMode.LEGACY, "Step only supported for SDM API"
-        if user_input is None:
-            _LOGGER.error("Reauth invoked with empty config entry data")
-            return self.async_abort(reason="missing_configuration")
         self._data.update(user_input)
 
         return await self.async_step_reauth_confirm()
diff --git a/tests/components/nest/test_config_flow_sdm.py b/tests/components/nest/test_config_flow_sdm.py
index 53a2d9cf2b6..b2ef95b138e 100644
--- a/tests/components/nest/test_config_flow_sdm.py
+++ b/tests/components/nest/test_config_flow_sdm.py
@@ -505,18 +505,6 @@ async def test_reauth_multiple_config_entries(
     assert entry.data.get("extra_data")
 
 
-async def test_reauth_missing_config_entry(hass, setup_platform):
-    """Test the reauth flow invoked missing existing data."""
-    await setup_platform()
-
-    # Invoke the reauth flow with no existing data
-    result = await hass.config_entries.flow.async_init(
-        DOMAIN, context={"source": config_entries.SOURCE_REAUTH}, data=None
-    )
-    assert result["type"] == "abort"
-    assert result["reason"] == "missing_configuration"
-
-
 @pytest.mark.parametrize(
     "nest_test_config,auth_implementation", [(TEST_CONFIG_HYBRID, APP_AUTH_DOMAIN)]
 )