diff --git a/helm/porthole/values-cluster.yaml b/helm/porthole/values-cluster.yaml
index 1f5e6b9..ded5974 100644
--- a/helm/porthole/values-cluster.yaml
+++ b/helm/porthole/values-cluster.yaml
@@ -20,3 +20,8 @@ web:
   enabled: false
 worker:
   enabled: false
+
+# Reduce MinIO storage for testing (insufficient storage on cluster)
+minio:
+  storage:
+    size: 20Gi