diff --git a/test/srt/test_vision_openai_server.py b/test/srt/test_vision_openai_server.py
index 0e40cfc15..6b5a775fa 100644
--- a/test/srt/test_vision_openai_server.py
+++ b/test/srt/test_vision_openai_server.py
@@ -724,6 +724,7 @@ class TestGemma3itServer(TestOpenAIVisionServer):
                 "gemma-it",
                 "--mem-fraction-static",
                 "0.75",
+                "--enable-gemma3-multimodal",
             ],
         )
         cls.base_url += "/v1"