diff --git a/demo/forms.py b/demo/forms.py
index c94a60db..392a5ca7 100644
--- a/demo/forms.py
+++ b/demo/forms.py
@@ -127,6 +127,14 @@ class SelectForm(BaseModel):
     search_select_single: str = Field(json_schema_extra={'search_url': '/api/forms/search'})
     search_select_multiple: list[str] = Field(json_schema_extra={'search_url': '/api/forms/search'})
 
+    @field_validator('select_multiple', 'search_select_multiple', mode='before')
+    @classmethod
+    def correct_select_multiple(cls, v: list[str]) -> list[str]:
+        if isinstance(v, list):
+            return v
+        else:
+            return [v]
+
 
 @router.post('/select', response_model=FastUI, response_model_exclude_none=True)
 async def select_form_post(form: Annotated[SelectForm, fastui_form(SelectForm)]):
diff --git a/demo/tests.py b/demo/tests.py
index a6c02161..2aafd563 100644
--- a/demo/tests.py
+++ b/demo/tests.py
@@ -5,6 +5,7 @@
 from fastapi.testclient import TestClient
 
 from . import app
+from .forms import ToolEnum
 
 client = TestClient(app)
 
@@ -68,4 +69,20 @@ def test_menu_links(url: str):
     assert isinstance(data, list)
 
 
+def test_forms_validate_correct_select_multiple():
+    with client as _client:
+        countries = _client.get('api/forms/search', params={'q': None})
+    countries_options = countries.json()['options']
+    r = client.post(
+        'api/forms/select',
+        data={
+            'select_single': ToolEnum._member_names_[0],
+            'select_multiple': ToolEnum._member_names_[0],
+            'search_select_single': countries_options[0]['options'][0]['value'],
+            'search_select_multiple': countries_options[0]['options'][0]['value'],
+        },
+    )
+    assert r.status_code == 200
+
+
 # TODO tests for forms, including submission