diff --git a/.buildkite/test-nightly.yml b/.buildkite/test-nightly.yml
index ecb910434..cc8bd4b5a 100644
--- a/.buildkite/test-nightly.yml
+++ b/.buildkite/test-nightly.yml
@@ -73,7 +73,7 @@ steps:
   - label: ":full_moon: Diffusion Model Test with H100"
     timeout_in_minutes: 60
     depends_on: upload-nightly-pipeline
-    # if: build.env("NIGHTLY") == "1"
+    if: build.env("NIGHTLY") == "1"
     commands:
       - export VLLM_WORKER_MULTIPROC_METHOD=spawn
       - pytest -s -v tests/e2e/online_serving/test_*_expansion.py -m "advanced_model and diffusion and H100" --run-level "advanced_model"