diff --git a/tests/demo_project/someapp/api.py b/tests/demo_project/someapp/api.py
index a9c98140..2e0686c7 100644
--- a/tests/demo_project/someapp/api.py
+++ b/tests/demo_project/someapp/api.py
@@ -12,13 +12,12 @@
 
 
 class EventSchema(BaseModel):
+    model_config = dict(from_attributes=True)
+
     title: str
     start_date: date
     end_date: date
 
-    class Config:
-        from_attributes = True
-
 
 @router.post("/create", url_name="event-create-url-name")
 def create_event(request, event: EventSchema):
diff --git a/tests/test_response.py b/tests/test_response.py
index 688186e6..5504e51e 100644
--- a/tests/test_response.py
+++ b/tests/test_response.py
@@ -45,10 +45,11 @@ class UserModel(BaseModel):
     user_name: str
     # skipping password output to responses
 
-    class Config:
-        from_attributes = True
-        alias_generator = to_camel
-        populate_by_name = True
+    model_config = dict(
+        from_attributes=True,
+        alias_generator=to_camel,
+        populate_by_name=True,
+    )
 
 
 @router.get("/check_model", response=UserModel)