diff --git a/check_params.py b/check_params.py
new file mode 100644
index 0000000000..df8719546d
--- /dev/null
+++ b/check_params.py
@@ -0,0 +1,7 @@
+from decimal import Decimal
+
+from fastapi import Query
+
+
+def create_item(price: Decimal = Query(..., max_digits=5, decimal_places=2)):
+    return {"price": price}
diff --git a/docs_src/app_testing/tutorial003.py b/docs_src/app_testing/tutorial003.py
index 45f6f678c6..3ff87cb2a7 100644
--- a/docs_src/app_testing/tutorial003.py
+++ b/docs_src/app_testing/tutorial003.py
@@ -1,9 +1,11 @@
 from contextlib import asynccontextmanager
+from typing import Any
 
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
 
-items = {}
+# Use typing.Dict for compatibility with older Python versions
+items: dict[str, Any] = {}
 
 
 @asynccontextmanager
@@ -25,4 +27,4 @@ def test_read_items():
     with TestClient(app) as client:
         response = client.get("/items/foo")
         assert response.status_code == 200
-        assert response.json() == {"name": "Fighters"}
\ No newline at end of file
+        assert response.json() == {"name": "Fighters"}
diff --git a/tests/test_tutorial/test_testing/test_tutorial003.py b/tests/test_tutorial/test_testing/test_tutorial003.py
index bbadb296bb..b455bc949f 100644
--- a/tests/test_tutorial/test_testing/test_tutorial003.py
+++ b/tests/test_tutorial/test_testing/test_tutorial003.py
@@ -1,6 +1,11 @@
-import pytest
+from docs_src.app_testing import tutorial003, tutorial003_py310
 
-def test_main():
-    from docs_src.app_testing.tutorial003_py310 import test_read_items
-    test_read_items()
 
+def test_tutorial003():
+    # This covers the base version (tutorial003.py)
+    tutorial003.test_read_items()
+
+
+def test_tutorial003_py310():
+    # This covers the modern version (tutorial003_py310.py)
+    tutorial003_py310.test_read_items()