diff --git a/vllm/entrypoints/openai/tool_parsers/deepseekv31_tool_parser.py b/vllm/entrypoints/openai/tool_parsers/deepseekv31_tool_parser.py
index ff9188190f3f..bd7c6c8ecee8 100644
--- a/vllm/entrypoints/openai/tool_parsers/deepseekv31_tool_parser.py
+++ b/vllm/entrypoints/openai/tool_parsers/deepseekv31_tool_parser.py
@@ -39,11 +39,11 @@ def __init__(self, tokenizer: AnyTokenizer):
         self.tool_call_end_token: str = "<｜tool▁call▁end｜>"
 
         self.tool_call_regex = re.compile(
-            r"<｜tool▁call▁begin｜>(?P<function_name>.*)<｜tool▁sep｜>(?P<function_arguments>.*)<｜tool▁call▁end｜>"
+            r"<｜tool▁call▁begin｜>(?P<function_name>.*?)<｜tool▁sep｜>(?P<function_arguments>.*?)<｜tool▁call▁end｜>"
         )
 
         self.stream_tool_call_portion_regex = re.compile(
-            r"(?P<function_name>.*)<｜tool▁sep｜>(?P<function_arguments>.*)")
+            r"(?P<function_name>.*?)<｜tool▁sep｜>(?P<function_arguments>.*)")
 
         self.stream_tool_call_name_regex = re.compile(
             r"(?P<function_name>.*)<｜tool▁sep｜>")