Update mock_server.py

Author: jackalcooper

tests/mock_server.py

@@ -423,6 +423,9 @@ async def generate(
             else:
                 extra_body["top_k"] = params.top_k
 
+        if params.enable_thinking:
+            extra_body["enable_thinking"] = True
+
         if params.enable_thinking and params.thinking_budget is not None:
             extra_body["thinking_budget"] = params.thinking_budget