diff --git a/scripts/install-helm.sh b/scripts/install-helm.sh
index ef71a7c32..41c18bd45 100755
--- a/scripts/install-helm.sh
+++ b/scripts/install-helm.sh
@@ -148,7 +148,7 @@ install_cephcsi_helm_charts() {
         NAMESPACE="default"
     fi
 
-    kubectl_retry create namespace ${NAMESPACE}
+    kubectl_retry create namespace "${NAMESPACE}"
 
     # label the nodes uniformly for domain information
     for node in $(kubectl_retry get node -o jsonpath='{.items[*].metadata.name}'); do
@@ -170,19 +170,19 @@ install_cephcsi_helm_charts() {
     # install ceph-csi-cephfs and ceph-csi-rbd charts
     # shellcheck disable=SC2086
     "${HELM}" install --namespace ${NAMESPACE} --set provisioner.fullnameOverride=csi-cephfsplugin-provisioner --set nodeplugin.fullnameOverride=csi-cephfsplugin --set configMapName=ceph-csi-config --set provisioner.replicaCount=1 --set-json='commonLabels={"app.kubernetes.io/name": "ceph-csi-cephfs", "app.kubernetes.io/managed-by": "helm"}' ${SET_SC_TEMPLATE_VALUES} ${CEPHFS_SECRET_TEMPLATE_VALUES} ${CEPHFS_CHART_NAME} "${SCRIPT_DIR}"/../charts/ceph-csi-cephfs
-    check_deployment_status app=ceph-csi-cephfs ${NAMESPACE}
-    check_daemonset_status app=ceph-csi-cephfs ${NAMESPACE}
+    check_deployment_status app=ceph-csi-cephfs "${NAMESPACE}"
+    check_daemonset_status app=ceph-csi-cephfs "${NAMESPACE}"
 
     # deleting configmaps as a workaround to avoid configmap already present
     # issue when installing ceph-csi-rbd
-    kubectl_retry delete cm ceph-csi-config --namespace ${NAMESPACE}
-    kubectl_retry delete cm ceph-config --namespace ${NAMESPACE}
+    kubectl_retry delete cm ceph-csi-config --namespace "${NAMESPACE}"
+    kubectl_retry delete cm ceph-config --namespace "${NAMESPACE}"
 
     # shellcheck disable=SC2086
     "${HELM}" install --namespace ${NAMESPACE} --set provisioner.fullnameOverride=csi-rbdplugin-provisioner --set nodeplugin.fullnameOverride=csi-rbdplugin --set configMapName=ceph-csi-config --set provisioner.replicaCount=1 --set-json='commonLabels={"app.kubernetes.io/name": "ceph-csi-rbd", "app.kubernetes.io/managed-by": "helm"}' ${SET_SC_TEMPLATE_VALUES} ${RBD_SECRET_TEMPLATE_VALUES} ${RBD_CHART_NAME} "${SCRIPT_DIR}"/../charts/ceph-csi-rbd --set topology.enabled=true --set topology.domainLabels="{${NODE_LABEL_REGION},${NODE_LABEL_ZONE}}" --set provisioner.maxSnapshotsOnImage=3 --set provisioner.minSnapshotsOnImage=2
 
-    check_deployment_status app=ceph-csi-rbd ${NAMESPACE}
-    check_daemonset_status app=ceph-csi-rbd ${NAMESPACE}
+    check_deployment_status app=ceph-csi-rbd "${NAMESPACE}"
+    check_daemonset_status app=ceph-csi-rbd "${NAMESPACE}"
 
 }
 
@@ -197,9 +197,9 @@ cleanup_cephcsi_helm_charts() {
     if [ -z "$NAMESPACE" ]; then
         NAMESPACE="default"
     fi
-    "${HELM}" uninstall ${CEPHFS_CHART_NAME} --namespace ${NAMESPACE}
-    "${HELM}" uninstall ${RBD_CHART_NAME} --namespace ${NAMESPACE}
-    kubectl_retry delete namespace ${NAMESPACE}
+    "${HELM}" uninstall ${CEPHFS_CHART_NAME} --namespace "${NAMESPACE}"
+    "${HELM}" uninstall ${RBD_CHART_NAME} --namespace "${NAMESPACE}"
+    kubectl_retry delete namespace "${NAMESPACE}"
 }
 
 helm_reset() {
diff --git a/scripts/install-snapshot.sh b/scripts/install-snapshot.sh
index aa2963104..eb72b2ae2 100755
--- a/scripts/install-snapshot.sh
+++ b/scripts/install-snapshot.sh
@@ -27,21 +27,21 @@ function install_snapshot_controller() {
         namespace="kube-system"
     fi
 
-    create_or_delete_resource "create" ${namespace}
+    create_or_delete_resource "create" "${namespace}"
 
-    pod_ready=$(kubectl get pods -l app=snapshot-controller -n ${namespace} -o jsonpath='{.items[0].status.containerStatuses[0].ready}')
+    pod_ready=$(kubectl get pods -l app=snapshot-controller -n "${namespace}" -o jsonpath='{.items[0].status.containerStatuses[0].ready}')
     INC=0
     until [[ "${pod_ready}" == "true" || $INC -gt 20 ]]; do
         sleep 10
         ((++INC))
-        pod_ready=$(kubectl get pods -l app=snapshot-controller -n ${namespace} -o jsonpath='{.items[0].status.containerStatuses[0].ready}')
+        pod_ready=$(kubectl get pods -l app=snapshot-controller -n "${namespace}" -o jsonpath='{.items[0].status.containerStatuses[0].ready}')
         echo "snapshotter pod status: ${pod_ready}"
     done
 
     if [ "${pod_ready}" != "true" ]; then
         echo "snapshotter controller creation failed"
-        kubectl get pods -l app=snapshot-controller -n ${namespace}
-        kubectl describe po -l app=snapshot-controller -n ${namespace}
+        kubectl get pods -l app=snapshot-controller -n "${namespace}"
+        kubectl describe po -l app=snapshot-controller -n "${namespace}"
         exit 1
     fi
 
@@ -53,7 +53,7 @@ function cleanup_snapshot_controller() {
     if [ -z "${namespace}" ]; then
         namespace="kube-system"
     fi
-    create_or_delete_resource "delete" ${namespace}
+    create_or_delete_resource "delete" "${namespace}"
 }
 
 function create_or_delete_resource() {
diff --git a/troubleshooting/tools/tracevol.py b/troubleshooting/tools/tracevol.py
index 45d96099b..d18f0e5c4 100755
--- a/troubleshooting/tools/tracevol.py
+++ b/troubleshooting/tools/tracevol.py
@@ -363,7 +363,7 @@ def get_tool_box_pod_name(arg):
             print("failed to pod %s", err)
     return ""
 
-#pylint: disable=too-many-branches
+#pylint: disable=too-many-branches, E0012, W0719
 def get_pool_name(arg, vol_id, is_rbd):
     """
     get pool name from ceph backend