diff --git a/llama_stack/providers/tests/inference/test_vision_inference.py b/llama_stack/providers/tests/inference/test_vision_inference.py
index 964f70901..a2434ac41 100644
--- a/llama_stack/providers/tests/inference/test_vision_inference.py
+++ b/llama_stack/providers/tests/inference/test_vision_inference.py
@@ -4,12 +4,12 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
+import base64
 from pathlib import Path
 
 import pytest
 
-from llama_stack.apis.common.content_types import ImageContentItem, TextContentItem, URL
-
+from llama_stack.apis.common.content_types import URL, ImageContentItem, TextContentItem
 from llama_stack.apis.inference import (
     ChatCompletionResponse,
     ChatCompletionResponseEventType,
@@ -23,7 +23,7 @@ from .utils import group_chunks
 THIS_DIR = Path(__file__).parent
 
 with open(THIS_DIR / "pasta.jpeg", "rb") as f:
-    PASTA_IMAGE = f.read()
+    PASTA_IMAGE = base64.b64encode(f.read()).decode("utf-8")
 
 
 class TestVisionModelInference: