diff --git a/docs_src/configure_swagger_ui/tutorial002.py b/docs_src/configure_swagger_ui/tutorial002.py
index cc569ce45..cc75c2196 100644
--- a/docs_src/configure_swagger_ui/tutorial002.py
+++ b/docs_src/configure_swagger_ui/tutorial002.py
@@ -1,6 +1,6 @@
 from fastapi import FastAPI
 
-app = FastAPI(swagger_ui_parameters={"syntaxHighlight.theme": "obsidian"})
+app = FastAPI(swagger_ui_parameters={"syntaxHighlight": {"theme": "obsidian"}})
 
 
 @app.get("/users/{username}")
diff --git a/tests/test_tutorial/test_configure_swagger_ui/test_tutorial002.py b/tests/test_tutorial/test_configure_swagger_ui/test_tutorial002.py
index 166901188..d06a385b5 100644
--- a/tests/test_tutorial/test_configure_swagger_ui/test_tutorial002.py
+++ b/tests/test_tutorial/test_configure_swagger_ui/test_tutorial002.py
@@ -12,7 +12,7 @@ def test_swagger_ui():
         '"syntaxHighlight": false' not in response.text
     ), "not used parameters should not be included"
     assert (
-        '"syntaxHighlight.theme": "obsidian"' in response.text
+        '"syntaxHighlight": {"theme": "obsidian"}' in response.text
     ), "parameters with middle dots should be included in a JSON compatible way"
     assert (
         '"dom_id": "#swagger-ui"' in response.text