diff --git a/.buildkite/test-e2e.yml b/.buildkite/test-e2e.yml
index 8fb0a07ba73..674ed48bdf3 100644
--- a/.buildkite/test-e2e.yml
+++ b/.buildkite/test-e2e.yml
@@ -98,7 +98,7 @@
     - KUBERAY_TEST_TIMEOUT_SHORT=1m KUBERAY_TEST_TIMEOUT_MEDIUM=5m KUBERAY_TEST_TIMEOUT_LONG=10m go test -timeout 60m -v ./test/e2eautoscaler/raycluster_autoscaler_part2_test.go ./test/e2eautoscaler/support.go 2>&1 | awk -f ../.buildkite/format.awk | tee $$KUBERAY_TEST_OUTPUT_DIR/gotest.log || (kubectl logs --tail -1 -l app.kubernetes.io/name=kuberay | tee $$KUBERAY_TEST_OUTPUT_DIR/kuberay-operator.log && cd $$KUBERAY_TEST_OUTPUT_DIR && find . -name "*.log" | tar -cf /artifact-mount/e2e-autoscaler-log.tar -T - && exit 1)
     - echo "--- END:Autoscaler E2E Part 2 (nightly operator) tests finished"
 
-- label: 'Test E2E Operator Version Upgrade (v1.4.0)'
+- label: 'Test E2E Operator Version Upgrade (v1.5.1)'
   instance_size: large
   image: golang:1.24-bookworm
   commands:
@@ -111,11 +111,11 @@
     - helm install kuberay-operator kuberay/kuberay-operator --version 1.3.2
     - kubectl wait --timeout=90s --for=condition=Available=true deployment kuberay-operator
     # Run e2e tests and print KubeRay operator logs if tests fail
-    - echo "--- START:Running e2e Operator upgrade (v1.3.2 to v1.4.0 operator) tests"
+    - echo "--- START:Running e2e Operator upgrade (v1.3.2 to v1.5.1 operator) tests"
     - mkdir -p "$(pwd)/tmp" && export KUBERAY_TEST_OUTPUT_DIR=$(pwd)/tmp
     - echo "KUBERAY_TEST_OUTPUT_DIR=$$KUBERAY_TEST_OUTPUT_DIR"
-    - KUBERAY_TEST_TIMEOUT_SHORT=1m KUBERAY_TEST_TIMEOUT_MEDIUM=5m KUBERAY_TEST_TIMEOUT_LONG=10m KUBERAY_TEST_UPGRADE_IMAGE=v1.4.0 go test -timeout 30m -v ./test/e2eupgrade 2>&1 | awk -f ../.buildkite/format.awk | tee $$KUBERAY_TEST_OUTPUT_DIR/gotest.log || (kubectl logs --tail -1 -l app.kubernetes.io/name=kuberay | tee $$KUBERAY_TEST_OUTPUT_DIR/kuberay-operator.log && cd $$KUBERAY_TEST_OUTPUT_DIR && find . -name "*.log" | tar -cf /artifact-mount/e2e-upgrade-log.tar -T - && exit 1)
-    - echo "--- END:e2e Operator upgrade (v1.3.2 to v1.4.0 operator) tests finished"
+    - KUBERAY_TEST_TIMEOUT_SHORT=1m KUBERAY_TEST_TIMEOUT_MEDIUM=5m KUBERAY_TEST_TIMEOUT_LONG=10m KUBERAY_TEST_UPGRADE_IMAGE=v1.5.1 go test -timeout 30m -v ./test/e2eupgrade 2>&1 | awk -f ../.buildkite/format.awk | tee $$KUBERAY_TEST_OUTPUT_DIR/gotest.log || (kubectl logs --tail -1 -l app.kubernetes.io/name=kuberay | tee $$KUBERAY_TEST_OUTPUT_DIR/kuberay-operator.log && cd $$KUBERAY_TEST_OUTPUT_DIR && find . -name "*.log" | tar -cf /artifact-mount/e2e-upgrade-log.tar -T - && exit 1)
+    - echo "--- END:e2e Operator upgrade (v1.3.2 to v1.5.1 operator) tests finished"
 
 - label: 'Test Apiserver E2E (nightly operator)'
   instance_size: large