diff --git a/tests/e2e/nightly/single_node/models/configs/Prefix-Cache-DeepSeek-R1-0528-W8A8.yaml b/tests/e2e/nightly/single_node/models/configs/Prefix-Cache-DeepSeek-R1-0528-W8A8.yaml
index 7629a7ff..cda4ef1f 100644
--- a/tests/e2e/nightly/single_node/models/configs/Prefix-Cache-DeepSeek-R1-0528-W8A8.yaml
+++ b/tests/e2e/nightly/single_node/models/configs/Prefix-Cache-DeepSeek-R1-0528-W8A8.yaml
@@ -42,7 +42,7 @@ test_cases:
       - metric: "TTFT"
         baseline: "prefix0"
         target: "prefix75"
-        ratio: 0.4
+        ratio: 0.5
         operator: "<"
     benchmarks:
       warm_up: