diff --git a/examples/client_calls.py b/examples/client_calls.py
index 23d253bfd..8e36c5faa 100755
--- a/examples/client_calls.py
+++ b/examples/client_calls.py
@@ -224,7 +224,7 @@ async def _execute_information_requests(client):
 async def _execute_diagnostic_requests(client):
     """Execute extended diagnostic requests."""
     _logger.info("### Running diagnostic requests.")
-    message = b"long test"
+    message = b"OK"
     rr = _check_call(
         await client.execute(
             req_diag.ReturnQueryDataRequest(message=message, slave=SLAVE)
diff --git a/examples/server_async.py b/examples/server_async.py
index 0df9dadab..2b449c53c 100755
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -221,5 +221,8 @@ async def run_async_server(args):
 
 
 if __name__ == "__main__":
-    run_args = setup_server(description="Run asynchronous server.")
+    run_args = setup_server(
+        description="Run asynchronous server.",
+        cmdline=["--log", "debug", "--framer", "rtu"],
+    )
     asyncio.run(run_async_server(run_args), debug=True)