diff --git a/tests/templates/kuttl/metrics/10-assert.yaml b/tests/templates/kuttl/metrics/10-assert.yaml
deleted file mode 100644
index 6c215fd..0000000
--- a/tests/templates/kuttl/metrics/10-assert.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
----
-apiVersion: kuttl.dev/v1beta1
-kind: TestAssert
-timeout: 600
----
-apiVersion: apps/v1
-kind: StatefulSet
-metadata:
-  name: prometheus-prometheus-stack-kube-prom-prometheus
-status:
-  readyReplicas: 1
-  replicas: 1
diff --git a/tests/templates/kuttl/metrics/10-install-prometheus.yaml b/tests/templates/kuttl/metrics/10-install-prometheus.yaml
index 33d83bf..59d5782 100644
--- a/tests/templates/kuttl/metrics/10-install-prometheus.yaml
+++ b/tests/templates/kuttl/metrics/10-install-prometheus.yaml
@@ -2,16 +2,13 @@
 apiVersion: kuttl.dev/v1beta1
 kind: TestStep
 commands:
-  # The kube-prometheus-stack Helm chart installs cluster wide
-  # resources, e.g. ClusterRoles. If all test cases use the same Helm
-  # chart version, then their contents are equal. Therefore, it is safe
-  # to take ownership instead of failing if the resources already exist.
+  # Append the namespace to the Helm release name so that cluster-wide
+  # resources get unique names.
   - script: >
-      helm install prometheus-stack
+      helm install prometheus-$NAMESPACE
       --namespace $NAMESPACE
-      --version 77.0.1
+      --version 80.14.2
       --values 10_kube-prometheus-stack-values.yaml
-      --take-ownership
       --wait
       oci://ghcr.io/prometheus-community/charts/kube-prometheus-stack
     timeout: 600
diff --git a/tests/templates/kuttl/metrics/11-create-service-monitor.yaml b/tests/templates/kuttl/metrics/11-create-service-monitor.yaml
index 9579f0a..f1b1578 100644
--- a/tests/templates/kuttl/metrics/11-create-service-monitor.yaml
+++ b/tests/templates/kuttl/metrics/11-create-service-monitor.yaml
@@ -1,47 +1,7 @@
 ---
-apiVersion: monitoring.coreos.com/v1
-kind: ServiceMonitor
-metadata:
-  name: stackable-opensearch
-  labels:
-    release: prometheus-stack
-spec:
-  selector:
-    matchLabels:
-      prometheus.io/scrape: "true"
-  endpoints:
-    - relabelings:
-        - sourceLabels:
-            - __meta_kubernetes_service_annotation_prometheus_io_scheme
-          action: replace
-          targetLabel: __scheme__
-          regex: (https?)
-        - sourceLabels:
-            - __meta_kubernetes_service_annotation_prometheus_io_path
-          action: replace
-          targetLabel: __metrics_path__
-          regex: (.+)
-        # Use the FQDN instead of the IP address because the IP address
-        # is not contained in the certificate.
-        - sourceLabels:
-            - __meta_kubernetes_pod_name
-            - __meta_kubernetes_service_name
-            - __meta_kubernetes_namespace
-            - __meta_kubernetes_service_annotation_prometheus_io_port
-          action: replace
-          targetLabel: __address__
-          regex: (.+);(.+);(.+);(\d+)
-          replacement: $1.$2.$3.svc.cluster.local:$4
-      tlsConfig:
-        ca:
-          configMap:
-            name: truststore
-            key: ca.crt
----
-apiVersion: secrets.stackable.tech/v1alpha1
-kind: TrustStore
-metadata:
-  name: truststore
-spec:
-  secretClassName: tls
-  format: tls-pem
+apiVersion: kuttl.dev/v1beta1
+kind: TestStep
+commands:
+  - script: >
+      envsubst '$NAMESPACE' < 11_service-monitor.yaml |
+      kubectl apply -n $NAMESPACE -f -
diff --git a/tests/templates/kuttl/metrics/11_service-monitor.yaml b/tests/templates/kuttl/metrics/11_service-monitor.yaml
new file mode 100644
index 0000000..fe172ff
--- /dev/null
+++ b/tests/templates/kuttl/metrics/11_service-monitor.yaml
@@ -0,0 +1,47 @@
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: stackable-opensearch
+  labels:
+    release: prometheus-$NAMESPACE
+spec:
+  selector:
+    matchLabels:
+      prometheus.io/scrape: "true"
+  endpoints:
+    - relabelings:
+        - sourceLabels:
+            - __meta_kubernetes_service_annotation_prometheus_io_scheme
+          action: replace
+          targetLabel: __scheme__
+          regex: (https?)
+        - sourceLabels:
+            - __meta_kubernetes_service_annotation_prometheus_io_path
+          action: replace
+          targetLabel: __metrics_path__
+          regex: (.+)
+        # Use the FQDN instead of the IP address because the IP address
+        # is not contained in the certificate.
+        - sourceLabels:
+            - __meta_kubernetes_pod_name
+            - __meta_kubernetes_service_name
+            - __meta_kubernetes_namespace
+            - __meta_kubernetes_service_annotation_prometheus_io_port
+          action: replace
+          targetLabel: __address__
+          regex: (.+);(.+);(.+);(\d+)
+          replacement: $1.$2.$3.svc.cluster.local:$4
+      tlsConfig:
+        ca:
+          configMap:
+            name: truststore
+            key: ca.crt
+---
+apiVersion: secrets.stackable.tech/v1alpha1
+kind: TrustStore
+metadata:
+  name: truststore
+spec:
+  secretClassName: tls
+  format: tls-pem