diff --git a/github/ci/prow-deploy/files/jobs/kubevirt/kubevirt/kubevirt-presubmits-1.4.yaml b/github/ci/prow-deploy/files/jobs/kubevirt/kubevirt/kubevirt-presubmits-1.4.yaml
index 09e5d20570..999a04528a 100644
--- a/github/ci/prow-deploy/files/jobs/kubevirt/kubevirt/kubevirt-presubmits-1.4.yaml
+++ b/github/ci/prow-deploy/files/jobs/kubevirt/kubevirt/kubevirt-presubmits-1.4.yaml
@@ -401,6 +401,7 @@ presubmits:
     cluster: prow-s390x-workloads
     context: pull-kubevirt-unit-test-s390x
     decorate: true
+    optional: true
     decoration_config:
       grace_period: 5m0s
       timeout: 2h0m0s
diff --git a/github/ci/prow-deploy/files/jobs/kubevirt/kubevirt/kubevirt-presubmits.yaml b/github/ci/prow-deploy/files/jobs/kubevirt/kubevirt/kubevirt-presubmits.yaml
index 0932ad9872..47fc937195 100644
--- a/github/ci/prow-deploy/files/jobs/kubevirt/kubevirt/kubevirt-presubmits.yaml
+++ b/github/ci/prow-deploy/files/jobs/kubevirt/kubevirt/kubevirt-presubmits.yaml
@@ -421,6 +421,7 @@ presubmits:
       fork-per-release: "true"
       testgrid-dashboards: kubevirt-presubmits
     cluster: prow-s390x-workloads
+    optional: true
     decorate: true
     decoration_config:
       grace_period: 5m0s