diff --git a/pytest_jupyter/jupyter_server.py b/pytest_jupyter/jupyter_server.py
index e5f61e5..65fdeb0 100644
--- a/pytest_jupyter/jupyter_server.py
+++ b/pytest_jupyter/jupyter_server.py
@@ -274,7 +274,7 @@ async def my_test(jp_fetch):
     .. code-block:: python
 
         async def my_test(jp_fetch):
-            response = await jp_fetch("api", "spec.yaml", params={'parameter': 'value'})
+            response = await jp_fetch("api", "spec.yaml", params={"parameter": "value"})
             ...
 
     A POST request with data: