diff --git a/test/e2e/main_test.go b/test/e2e/main_test.go
index e3c80f5c8..1527d8b1b 100644
--- a/test/e2e/main_test.go
+++ b/test/e2e/main_test.go
@@ -29,8 +29,9 @@ var (
 const e2eTestNamespace = "e2e-tests"
 
 var (
-	retain            = flag.Bool("retain", false, "When set, the namespace in which tests are run will not be cleaned up")
-	operatorInstallNS = flag.String("operatorInstallNS", "openshift-operator", "The namespace where the operator is installed")
+	retain              = flag.Bool("retain", false, "When set, the namespace in which tests are run will not be cleaned up")
+	operatorInstallNS   = flag.String("operatorInstallNS", "openshift-operator", "The namespace where the operator is installed")
+	postponeRestoration = flag.Duration("postpone-restoration", 0, "Wait this duration before restoring the operator Subscription after uninstall tests (e.g. 10m for manual inspection)")
 )
 
 func TestMain(m *testing.M) {
diff --git a/test/e2e/uiplugin_uninstall_test.go b/test/e2e/uiplugin_uninstall_test.go
new file mode 100644
index 000000000..142a35d90
--- /dev/null
+++ b/test/e2e/uiplugin_uninstall_test.go
@@ -0,0 +1,330 @@
+package e2e
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	"gotest.tools/v3/assert"
+	appsv1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
+	rbacv1 "k8s.io/api/rbac/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	olmv1alpha1 "github.com/operator-framework/api/pkg/operators/v1alpha1"
+
+	uiv1 "github.com/rhobs/observability-operator/pkg/apis/uiplugin/v1alpha1"
+	"github.com/rhobs/observability-operator/test/e2e/framework"
+)
+
+// TestUIPluginUninstallCleanup verifies that UIPlugin operands are properly
+// cleaned up when the operator is uninstalled via OLM (CSV + Subscription
+// deletion). This reproduces the scenario where a user uninstalls COO from the
+// OpenShift console or CLI without manually deleting UIPlugin CRs first.
+//
+// The test:
+//  1. Creates a monitoring UIPlugin with health-analyzer enabled
+//  2. Waits for operand deployments to be ready
+//  3. Simulates OLM uninstall by deleting the CSV and Subscription
+//  4. Verifies that UIPlugin CRs and all child resources are cleaned up
+func TestUIPluginUninstallCleanup(t *testing.T) {
+	if !f.IsOpenshiftCluster {
+		t.Skip("Skipping: requires OpenShift cluster")
+	}
+
+	f.SkipIfClusterVersionBelow(t, "4.19")
+
+	assertCRDExists(t, "uiplugins.observability.openshift.io")
+
+	ctx := context.Background()
+	ns := f.OperatorNamespace
+
+	// --- Phase 0: Clean up any leftover UIPlugins from previous runs ---
+	// A prior test run may have left UIPlugins stuck in Terminating with
+	// finalizers that can't be processed (operator already gone). Force-remove
+	// them so we start clean.
+
+	t.Log("Phase 0: Ensuring no stale UIPlugins exist")
+	forceDeleteAllUIPlugins(t, ctx)
+
+	// --- Phase 1: Create UIPlugin and verify operands are running ---
+
+	t.Log("Phase 1: Creating monitoring UIPlugin with health-analyzer enabled")
+	plugin := &uiv1.UIPlugin{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "monitoring",
+		},
+		Spec: uiv1.UIPluginSpec{
+			Type: uiv1.TypeMonitoring,
+			Monitoring: &uiv1.MonitoringConfig{
+				ClusterHealthAnalyzer: &uiv1.ClusterHealthAnalyzerReference{
+					Enabled: true,
+				},
+			},
+		},
+	}
+
+	err := f.K8sClient.Create(ctx, plugin)
+	assert.NilError(t, err, "failed to create monitoring UIPlugin")
+
+	t.Log("Waiting for monitoring plugin deployment to be ready...")
+	f.AssertDeploymentReady("monitoring", ns, framework.WithTimeout(5*time.Minute))(t)
+
+	t.Log("Waiting for health-analyzer deployment to be ready...")
+	f.AssertDeploymentReady("health-analyzer", ns, framework.WithTimeout(5*time.Minute))(t)
+
+	// --- Phase 2: Simulate OLM uninstall (delete CSV + Subscription) ---
+
+	t.Log("Phase 2: Simulating OLM uninstall by deleting CSV and Subscription")
+
+	csv, sub := findOLMResources(t, ctx, ns)
+
+	// Register cleanup to reinstall the operator after the test finishes,
+	// unless -retain is set (useful for inspecting the post-uninstall state).
+	// Use -postpone-restoration=10m to delay restoration for manual inspection.
+	if sub != nil && !f.Retain {
+		savedSub := &olmv1alpha1.Subscription{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      sub.Name,
+				Namespace: sub.Namespace,
+			},
+			Spec: sub.Spec.DeepCopy(),
+		}
+		t.Cleanup(func() {
+			if delay := *postponeRestoration; delay > 0 {
+				t.Logf("Cleanup: Waiting %v before restoring operator (inspect the cluster now)", delay)
+				time.Sleep(delay)
+			}
+			t.Log("Cleanup: Reinstalling operator Subscription so the cluster is usable for next run")
+			forceDeleteAllUIPlugins(t, context.Background())
+			if err := f.K8sClient.Create(context.Background(), savedSub); err != nil {
+				if apierrors.IsAlreadyExists(err) {
+					t.Log("Cleanup: Subscription already exists, skipping")
+					return
+				}
+				t.Logf("Cleanup: WARNING — failed to recreate Subscription: %v", err)
+				t.Log("Cleanup: Reinstall manually with: oc apply -f <subscription.yaml>")
+				return
+			}
+			t.Log("Cleanup: Subscription recreated, OLM will reinstall the operator")
+		})
+	}
+
+	if sub != nil {
+		t.Logf("Deleting Subscription %s/%s", sub.Namespace, sub.Name)
+		err = f.K8sClient.Delete(ctx, sub)
+		if err != nil && !apierrors.IsNotFound(err) {
+			t.Fatalf("failed to delete Subscription: %v", err)
+		}
+	}
+
+	if csv != nil {
+		t.Logf("Deleting CSV %s/%s", csv.Namespace, csv.Name)
+		err = f.K8sClient.Delete(ctx, csv)
+		if err != nil && !apierrors.IsNotFound(err) {
+			t.Fatalf("failed to delete CSV: %v", err)
+		}
+	}
+
+	t.Log("Waiting for operator deployment to be removed...")
+	waitForResourceAbsent(t, "observability-operator", ns, &appsv1.Deployment{}, 5*time.Minute)
+
+	// --- Phase 3: Verify cleanup ---
+
+	t.Log("Phase 3: Verifying UIPlugin and operand cleanup (parallel assertions follow)")
+	t.Log("--- parallel resource checks start ---")
+
+	cleanupTimeout := 3 * time.Minute
+
+	t.Run("UIPlugin CR is deleted", func(t *testing.T) {
+		t.Parallel()
+		waitForResourceAbsent(t, "monitoring", "", &uiv1.UIPlugin{}, cleanupTimeout)
+	})
+
+	t.Run("monitoring plugin deployment is deleted", func(t *testing.T) {
+		t.Parallel()
+		waitForResourceAbsent(t, "monitoring", ns, &appsv1.Deployment{}, cleanupTimeout)
+	})
+
+	t.Run("health-analyzer deployment is deleted", func(t *testing.T) {
+		t.Parallel()
+		waitForResourceAbsent(t, "health-analyzer", ns, &appsv1.Deployment{}, cleanupTimeout)
+	})
+
+	t.Run("health-analyzer service is deleted", func(t *testing.T) {
+		t.Parallel()
+		waitForResourceAbsent(t, "health-analyzer", ns, &corev1.Service{}, cleanupTimeout)
+	})
+
+	t.Run("monitoring plugin service is deleted", func(t *testing.T) {
+		t.Parallel()
+		waitForResourceAbsent(t, "monitoring", ns, &corev1.Service{}, cleanupTimeout)
+	})
+
+	t.Run("monitoring plugin service account is deleted", func(t *testing.T) {
+		t.Parallel()
+		waitForResourceAbsent(t, "monitoring-sa", ns, &corev1.ServiceAccount{}, cleanupTimeout)
+	})
+
+	t.Run("components-health-view ClusterRole is deleted", func(t *testing.T) {
+		t.Parallel()
+		waitForResourceAbsent(t, "components-health-view", "", &rbacv1.ClusterRole{}, cleanupTimeout)
+	})
+
+	t.Run("components-health-view ClusterRoleBinding is deleted", func(t *testing.T) {
+		t.Parallel()
+		waitForResourceAbsent(t, "monitoring-components-health-view", "", &rbacv1.ClusterRoleBinding{}, cleanupTimeout)
+	})
+
+	t.Run("no UIPlugin-managed pods remain in operator namespace", func(t *testing.T) {
+		t.Parallel()
+		assertNoManagedPodsRemain(t, ctx, ns)
+	})
+
+	// Note: parallel subtests complete before this function returns.
+	t.Log("--- parallel resource checks done ---")
+}
+
+// findOLMResources locates the COO Subscription and CSV in the given namespace.
+func findOLMResources(t *testing.T, ctx context.Context, ns string) (*olmv1alpha1.ClusterServiceVersion, *olmv1alpha1.Subscription) {
+	t.Helper()
+
+	var foundCSV *olmv1alpha1.ClusterServiceVersion
+	var foundSub *olmv1alpha1.Subscription
+
+	subs := &olmv1alpha1.SubscriptionList{}
+	err := f.K8sClient.List(ctx, subs, &client.ListOptions{Namespace: ns})
+	if err != nil {
+		t.Logf("warning: failed to list subscriptions: %v", err)
+	} else {
+		for i := range subs.Items {
+			if subs.Items[i].Spec.Package == "observability-operator" ||
+				subs.Items[i].Spec.Package == "cluster-observability-operator" {
+				foundSub = &subs.Items[i]
+				t.Logf("Found Subscription: %s (package: %s)", foundSub.Name, foundSub.Spec.Package)
+				break
+			}
+		}
+	}
+
+	csvs := &olmv1alpha1.ClusterServiceVersionList{}
+	err = f.K8sClient.List(ctx, csvs, &client.ListOptions{Namespace: ns})
+	if err != nil {
+		t.Logf("warning: failed to list CSVs: %v", err)
+	} else {
+		for i := range csvs.Items {
+			if strings.Contains(csvs.Items[i].Name, "observability-operator") {
+				foundCSV = &csvs.Items[i]
+				t.Logf("Found CSV: %s", foundCSV.Name)
+				break
+			}
+		}
+	}
+
+	if foundCSV == nil && foundSub == nil {
+		t.Fatal("Could not find COO Subscription or CSV — operator may not be installed via OLM")
+	}
+
+	return foundCSV, foundSub
+}
+
+// waitForResourceAbsent polls until the named resource no longer exists.
+func waitForResourceAbsent(t *testing.T, name, namespace string, obj client.Object, timeout time.Duration) {
+	t.Helper()
+	key := client.ObjectKey{Name: name, Namespace: namespace}
+	err := wait.PollUntilContextTimeout(context.Background(), 5*time.Second, timeout, true, func(ctx context.Context) (bool, error) {
+		if err := f.K8sClient.Get(ctx, key, obj); apierrors.IsNotFound(err) {
+			return true, nil
+		}
+		return false, nil
+	})
+	if wait.Interrupted(err) {
+		kind := fmt.Sprintf("%T", obj)
+		t.Fatalf("%s %s/%s was not cleaned up after operator uninstall (waited %v)", kind, namespace, name, timeout)
+	}
+}
+
+// forceDeleteAllUIPlugins removes all UIPlugin CRs, stripping finalizers if
+// necessary. This handles the case where a previous test left UIPlugins stuck
+// in Terminating because the operator was already gone.
+func forceDeleteAllUIPlugins(t *testing.T, ctx context.Context) {
+	t.Helper()
+
+	var plugins uiv1.UIPluginList
+	if err := f.K8sClient.List(ctx, &plugins); err != nil {
+		t.Logf("Could not list UIPlugins (CRD may not exist yet): %v", err)
+		return
+	}
+
+	for i := range plugins.Items {
+		p := &plugins.Items[i]
+
+		if len(p.Finalizers) > 0 {
+			t.Logf("Stripping finalizers from UIPlugin %s", p.Name)
+			patch := client.MergeFrom(p.DeepCopy())
+			p.Finalizers = nil
+			if err := f.K8sClient.Patch(ctx, p, patch); err != nil && !apierrors.IsNotFound(err) {
+				t.Logf("warning: failed to strip finalizers from %s: %v", p.Name, err)
+			}
+		}
+
+		if p.DeletionTimestamp.IsZero() {
+			t.Logf("Deleting UIPlugin %s", p.Name)
+			if err := f.K8sClient.Delete(ctx, p); err != nil && !apierrors.IsNotFound(err) {
+				t.Logf("warning: failed to delete UIPlugin %s: %v", p.Name, err)
+			}
+		}
+	}
+
+	// Wait for all UIPlugins to be gone
+	err := wait.PollUntilContextTimeout(ctx, 5*time.Second, 2*time.Minute, true, func(ctx context.Context) (bool, error) {
+		var remaining uiv1.UIPluginList
+		if err := f.K8sClient.List(ctx, &remaining); err != nil {
+			return false, nil
+		}
+		return len(remaining.Items) == 0, nil
+	})
+	if wait.Interrupted(err) {
+		t.Fatal("Stale UIPlugins still exist after force cleanup")
+	}
+}
+
+// assertNoManagedPodsRemain verifies that no UIPlugin-managed pods are left
+// running in the operator namespace after uninstall.
+func assertNoManagedPodsRemain(t *testing.T, ctx context.Context, namespace string) {
+	t.Helper()
+
+	managedLabels := map[string]string{
+		"app.kubernetes.io/managed-by": "observability-operator",
+	}
+
+	var lastSeen []string
+	err := wait.PollUntilContextTimeout(ctx, 10*time.Second, 5*time.Minute, true, func(ctx context.Context) (bool, error) {
+		pods := &corev1.PodList{}
+		if err := f.K8sClient.List(ctx, pods,
+			client.InNamespace(namespace),
+			client.MatchingLabels(managedLabels),
+		); err != nil {
+			return false, nil
+		}
+
+		if len(pods.Items) == 0 {
+			return true, nil
+		}
+
+		lastSeen = make([]string, 0, len(pods.Items))
+		for _, p := range pods.Items {
+			lastSeen = append(lastSeen, fmt.Sprintf("%s (phase=%s)", p.Name, p.Status.Phase))
+		}
+		return false, nil
+	})
+
+	if wait.Interrupted(err) {
+		t.Fatalf("managed pods not cleaned up after operator uninstall: %v", lastSeen)
+	}
+}