diff --git a/cmd/demo_scripts/create_qovery_demo.sh b/cmd/demo_scripts/create_qovery_demo.sh
index 38b1e5fb..0d1b5f00 100755
--- a/cmd/demo_scripts/create_qovery_demo.sh
+++ b/cmd/demo_scripts/create_qovery_demo.sh
@@ -154,7 +154,7 @@ install_or_upgrade_helm_charts() {
       --set services.qovery.qovery-cluster-agent.enabled=false \
       --set services.qovery.qovery-engine.enabled=false \
       --set services.qovery.qovery-operator.enabled=false \
-      "${engine_image_overrides[@]}" qovery "$chart_source"
+      "${engine_image_overrides[@]+"${engine_image_overrides[@]}"}" qovery "$chart_source"
   fi
 
   for i in $(seq 1 3); do
@@ -162,7 +162,7 @@ install_or_upgrade_helm_charts() {
     helm upgrade --install --create-namespace ${HELM_DEBUG} --timeout=15m -n qovery "${helm_values_args[@]}" --wait --atomic \
       --set services.ingress.envoy-gateway-crd.enabled=false \
       --set services.qovery.qovery-operator.enabled=false \
-      "${engine_image_overrides[@]}" qovery "$chart_source" && break
+      "${engine_image_overrides[@]+"${engine_image_overrides[@]}"}" qovery "$chart_source" && break
     set +x
     echo "Install failed. Retrying in 10 seconds. To let the cluster initialize"
     sleep 10
diff --git a/cmd/demo_up_local_overrides_test.go b/cmd/demo_up_local_overrides_test.go
index 94f5e77b..58baff03 100644
--- a/cmd/demo_up_local_overrides_test.go
+++ b/cmd/demo_up_local_overrides_test.go
@@ -3,6 +3,7 @@ package cmd
 import (
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 )
 
@@ -32,3 +33,11 @@ func TestDemoEngineImageOverride(t *testing.T) {
 		t.Fatalf("expected docker.io/library/qovery-demo-engine:local, got %s:%s", repository, tag)
 	}
 }
+
+func TestDemoScriptUsesNounsetSafeEmptyEngineImageOverrides(t *testing.T) {
+	const nounsetSafeOverrides = `"${engine_image_overrides[@]+"${engine_image_overrides[@]}"}"`
+
+	if count := strings.Count(string(demoScriptsCreate), nounsetSafeOverrides); count != 2 {
+		t.Fatalf("expected both Helm invocations to use a Bash 3.2 nounset-safe engine image override expansion, found %d", count)
+	}
+}