diff --git a/test/registered/8-gpu-models/test_glm_51_fp8.py b/test/registered/8-gpu-models/test_glm_51_fp8.py
index ace31a06f..f96cc16b7 100644
--- a/test/registered/8-gpu-models/test_glm_51_fp8.py
+++ b/test/registered/8-gpu-models/test_glm_51_fp8.py
@@ -15,7 +15,7 @@ COMMON_ARGS = [
     "--trust-remote-code",
     "--reasoning-parser=glm45",
     "--tool-call-parser=glm47",
-    "--mem-fraction-static=0.9",
+    "--mem-fraction-static=0.85",
     "--enable-metrics",
 ]