diff --git a/litellm/tests/test_caching.py b/litellm/tests/test_caching.py
index 4bc5d1d5a..100b29847 100644
--- a/litellm/tests/test_caching.py
+++ b/litellm/tests/test_caching.py
@@ -505,7 +505,7 @@ def test_redis_cache_completion_stream():
         response_2_id = ""
         for chunk in response2:
             print(chunk)
-            response_2_id += chunk.id
+            response_2_id = chunk.id
         assert (
             response_1_id == response_2_id
         ), f"Response 1 != Response 2. Same params, Response 1{response_1_id} != Response 2{response_2_id}"