diff --git a/Makefile.rhai b/Makefile.rhai
index 1ea9a6fd01..7be3196d68 100644
--- a/Makefile.rhai
+++ b/Makefile.rhai
@@ -22,7 +22,7 @@ SED ?= sed
 KUBECTL ?= $(shell command -v oc 2>/dev/null || command -v kubectl 2>/dev/null)
 RHOAI_MANIFESTS_DIR ?= $(PROJECT_DIR)/manifests/rhoai
 RHAI_TEST_MANIFESTS_DIR ?= $(PROJECT_DIR)/odh_utils/tests/manifests
-APPLICATIONS_NAMESPACE ?= opendatahub
+APPLICATIONS_NAMESPACE ?= redhat-ods-applications
 NFS_PROVISIONER_OPERATOR_MANIFEST ?= $(RHAI_TEST_MANIFESTS_DIR)/nfs-provisioner-operator.yaml
 NFS_PROVISIONER_MANIFEST ?= $(RHAI_TEST_MANIFESTS_DIR)/nfs-provisioner.yaml
 TRAINER_IMAGE ?=
@@ -260,19 +260,19 @@ deploy-rhoai: install-jobset-operator ## Install Trainer using RHOAI manifests w
 		echo "Using Trainer image: $(TRAINER_IMAGE)"
 		$(SED) -i "s|odh-kubeflow-trainer-controller-image=.*|odh-kubeflow-trainer-controller-image=$(TRAINER_IMAGE)|" "$(RHOAI_MANIFESTS_DIR)/params.env"
 	fi
-	@echo "Deploying RHOAI Training Operator to namespace: opendatahub"
-	$(KUBECTL) create namespace opendatahub --dry-run=client -o yaml | $(KUBECTL) apply -f - >/dev/null 2>&1
-	$(KUBECTL) label namespace opendatahub openshift.io/cluster-monitoring=true --overwrite
+	@echo "Deploying RHOAI Training Operator to namespace: $(APPLICATIONS_NAMESPACE)"
+	$(KUBECTL) create namespace $(APPLICATIONS_NAMESPACE) --dry-run=client -o yaml | $(KUBECTL) apply -f - >/dev/null 2>&1
+	$(KUBECTL) label namespace $(APPLICATIONS_NAMESPACE) openshift.io/cluster-monitoring=true --overwrite
 	# The PR environment deploys Trainer without the full RHOAI operator bundle,
 	# so provide the namespace-scoped discovery permissions normally installed by RHOAI.
 	$(KUBECTL) create role prometheus-k8s-monitoring \
 		--verb=get --verb=list --verb=watch \
 		--resource=pods,services,endpoints \
-		-n opendatahub --dry-run=client -o yaml | $(KUBECTL) apply -f - >/dev/null
+		-n $(APPLICATIONS_NAMESPACE) --dry-run=client -o yaml | $(KUBECTL) apply -f - >/dev/null
 	$(KUBECTL) create rolebinding prometheus-k8s-monitoring \
 		--role=prometheus-k8s-monitoring \
 		--serviceaccount=openshift-monitoring:prometheus-k8s \
-		-n opendatahub --dry-run=client -o yaml | $(KUBECTL) apply -f - >/dev/null
+		-n $(APPLICATIONS_NAMESPACE) --dry-run=client -o yaml | $(KUBECTL) apply -f - >/dev/null
 	echo "Applying CRDs first..."
 	$(KUBECTL) apply --server-side=true -k $(RHOAI_MANIFESTS_DIR)/../base/crds
 	echo "Waiting for CRDs to be established..."
@@ -284,7 +284,7 @@ deploy-rhoai: install-jobset-operator ## Install Trainer using RHOAI manifests w
 	$(KUBECTL) apply -k $(RHOAI_MANIFESTS_DIR) --server-side=true --force-conflicts
 	echo "Waiting for deployment to be ready..."
 	$(KUBECTL) wait --for=condition=available --timeout=300s \
-		deployment/kubeflow-trainer-controller-manager -n opendatahub 2>/dev/null
+		deployment/kubeflow-trainer-controller-manager -n $(APPLICATIONS_NAMESPACE) 2>/dev/null
 	echo "RHOAI Training Operator deployed successfully!"
 
 .PHONY: install-test-runtimes
@@ -583,7 +583,7 @@ test-integration-rhai: ## Run the complete RHOAI Trainer integration test suite.
 
 .PHONY: undeploy-rhoai
 undeploy-rhoai: check-kubectl ## Undeploy Trainer using RHOAI manifests.
-	@echo "Undeploying RHOAI Training Operator from namespace: opendatahub"
+	@echo "Undeploying RHOAI Training Operator from namespace: $(APPLICATIONS_NAMESPACE)"
 	echo "Deleting all TrainJob and TrainingRuntime CRs..."
 	$(KUBECTL) delete trainjobs.trainer.kubeflow.org --all --all-namespaces --ignore-not-found=true --timeout=60s
 	$(KUBECTL) delete trainingruntimes.trainer.kubeflow.org --all --all-namespaces --ignore-not-found=true --timeout=60s
diff --git a/manifests/rhoai/kustomization.yaml b/manifests/rhoai/kustomization.yaml
index 55c08c5ddb..0264b6b65a 100644
--- a/manifests/rhoai/kustomization.yaml
+++ b/manifests/rhoai/kustomization.yaml
@@ -1,7 +1,7 @@
 # RHOAI configuration for Kubeflow Training Operator (KFTO)
 
 # Adds namespace to all resources.
-namespace: opendatahub
+namespace: redhat-ods-applications
 
 sortOptions:
   order: legacy
diff --git a/test/e2e/e2e_test.go b/test/e2e/e2e_test.go
index aa67fe7190..6f2a930872 100644
--- a/test/e2e/e2e_test.go
+++ b/test/e2e/e2e_test.go
@@ -52,6 +52,9 @@ var _ = ginkgo.Describe("TrainJob e2e", func() {
 			// Create a TrainJob.
 			trainJob := testingutil.MakeTrainJobWrapper(ns.Name, "e2e-test-torch").
 				RuntimeRef(trainer.SchemeGroupVersion.WithKind(trainer.ClusterTrainingRuntimeKind), torchRuntime).
+				Trainer(&trainer.Trainer{
+					Command: []string{"python", "-c", "print(\"Trainer E2E\")"},
+				}).
 				Obj()
 
 			ginkgo.By("Create a TrainJob with torch-distributed runtime reference", func() {
@@ -107,7 +110,10 @@ var _ = ginkgo.Describe("TrainJob e2e", func() {
 	ginkgo.When("Creating TrainJob to perform OpenMPI workload", func() {
 		// Verify the `deepspeed-distributed` ClusterTrainingRuntime.
 		ginkgo.It("should create TrainJob with DeepSpeed runtime reference", func() {
-			// Create a TrainJob.
+			// TODO: Remove this skip once an OpenShift-compatible MPI runtime image is available.
+			ginkgo.Skip("MPI runtime image is not available")
+
+			// Create a multi-node MPI TrainJob.
 			trainJob := testingutil.MakeTrainJobWrapper(ns.Name, "e2e-test-deepspeed").
 				RuntimeRef(trainer.SchemeGroupVersion.WithKind(trainer.ClusterTrainingRuntimeKind), deepSpeedRuntime).
 				Obj()