diff --git a/scripts/install-helm.sh b/scripts/install-helm.sh
index 5200752536..247ff82d17 100755
--- a/scripts/install-helm.sh
+++ b/scripts/install-helm.sh
@@ -19,7 +19,9 @@ REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
 cd "${REPO_ROOT}"
 
 # Required environment variables
+# shellcheck disable=SC2269 # validate non-null with errexit + nounset
 HELM_VERSION=${HELM_VERSION}
+# shellcheck disable=SC2269 # validate non-null with errexit + nounset
 INSTALL_DIR=${INSTALL_DIR}
 
 # Optional environment variables
diff --git a/scripts/install-kustomize.sh b/scripts/install-kustomize.sh
index be606a2393..238579c1a7 100755
--- a/scripts/install-kustomize.sh
+++ b/scripts/install-kustomize.sh
@@ -19,7 +19,9 @@ REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
 cd "${REPO_ROOT}"
 
 # Required environment variables
+# shellcheck disable=SC2269 # validate non-null with errexit + nounset
 KUSTOMIZE_VERSION=${KUSTOMIZE_VERSION}
+# shellcheck disable=SC2269 # validate non-null with errexit + nounset
 INSTALL_DIR=${INSTALL_DIR}
 
 # Optional environment variables