diff --git a/homeassistant/auth/__init__.py b/homeassistant/auth/__init__.py
index c0beba1a22760f..5f50bfd5fb3fc8 100644
--- a/homeassistant/auth/__init__.py
+++ b/homeassistant/auth/__init__.py
@@ -235,13 +235,6 @@ async def async_enable_user_mfa(self, user: models.User,
             raise ValueError('Unable find multi-factor auth module: {}'
                              .format(mfa_module_id))
 
-        if module.setup_schema is not None:
-            try:
-                # pylint: disable=not-callable
-                data = module.setup_schema(data)
-            except vol.Invalid as err:
-                raise ValueError('Data does not match schema: {}'.format(err))
-
         await module.async_setup_user(user.id, data)
 
     async def async_disable_user_mfa(self, user: models.User,
diff --git a/homeassistant/auth/mfa_modules/__init__.py b/homeassistant/auth/mfa_modules/__init__.py
index cec1d29f51f990..7f8e426ae19c67 100644
--- a/homeassistant/auth/mfa_modules/__init__.py
+++ b/homeassistant/auth/mfa_modules/__init__.py
@@ -64,20 +64,12 @@ def input_schema(self) -> vol.Schema:
         """Return a voluptuous schema to define mfa auth module's input."""
         raise NotImplementedError
 
-    @property
-    def setup_schema(self) -> Optional[vol.Schema]:
-        """Return a vol schema to validate mfa auth module's setup input.
-
-        Optional
-        """
-        return None
-
     async def async_setup_flow(self, user_id: str) -> 'SetupFlow':
         """Return a data entry flow handler for setup module.
 
         Mfa module should extend SetupFlow
         """
-        return SetupFlow(self, user_id)
+        return SetupFlow(self, vol.Schema({}), user_id)
 
     async def async_setup_user(self, user_id: str, setup_data: Any) -> Any:
         """Set up user for mfa auth module."""
@@ -101,9 +93,11 @@ class SetupFlow(data_entry_flow.FlowHandler):
     """Handler for the setup flow."""
 
     def __init__(self, auth_module: MultiFactorAuthModule,
+                 setup_schema: vol.Schema,
                  user_id: str) -> None:
         """Initialize the setup flow."""
         self._auth_module = auth_module
+        self._setup_schema = setup_schema
         self._user_id = user_id
 
     async def async_step_init(
@@ -126,7 +120,7 @@ async def async_step_init(
 
         return self.async_show_form(
             step_id='init',
-            data_schema=self._auth_module.setup_schema,
+            data_schema=self._setup_schema,
             errors=errors
         )
 
diff --git a/homeassistant/auth/mfa_modules/insecure_example.py b/homeassistant/auth/mfa_modules/insecure_example.py
index e870fa2ee27856..8bd68c565ac6e0 100644
--- a/homeassistant/auth/mfa_modules/insecure_example.py
+++ b/homeassistant/auth/mfa_modules/insecure_example.py
@@ -7,7 +7,7 @@
 from homeassistant.core import HomeAssistant
 
 from . import MultiFactorAuthModule, MULTI_FACTOR_AUTH_MODULES, \
-    MULTI_FACTOR_AUTH_MODULE_SCHEMA
+    MULTI_FACTOR_AUTH_MODULE_SCHEMA, SetupFlow
 
 CONFIG_SCHEMA = MULTI_FACTOR_AUTH_MODULE_SCHEMA.extend({
     vol.Required('data'): [vol.Schema({
@@ -36,10 +36,17 @@ def input_schema(self) -> vol.Schema:
         return vol.Schema({'pin': str})
 
     @property
-    def setup_schema(self) -> Optional[vol.Schema]:
+    def setup_schema(self) -> vol.Schema:
         """Validate async_setup_user input data."""
         return vol.Schema({'pin': str})
 
+    async def async_setup_flow(self, user_id: str) -> SetupFlow:
+        """Return a data entry flow handler for setup module.
+
+        Mfa module should extend SetupFlow
+        """
+        return SetupFlow(self, self.setup_schema, user_id)
+
     async def async_setup_user(self, user_id: str, setup_data: Any) -> Any:
         """Set up user to use mfa module."""
         # data shall has been validate in caller