diff --git a/.github/workflows/e2e-test.yml b/.github/workflows/e2e-test.yml
index 71eb9f53a4..983387bb07 100644
--- a/.github/workflows/e2e-test.yml
+++ b/.github/workflows/e2e-test.yml
@@ -286,6 +286,6 @@ jobs:
           GH_TOKEN: ${{ github.token }}
         uses: ./.github/actions/update_tfstate
         with:
-          name: terraform-state-${{ steps.e2e_test.outputs.namePrefix }} 
+          name: terraform-state-${{ steps.e2e_test.outputs.namePrefix }}
           runID: ${{ github.run_id }}
           encryptionSecret: ${{ secrets.ARTIFACT_ENCRYPT_PASSWD }}
diff --git a/terraform/infrastructure/aws/variables.tf b/terraform/infrastructure/aws/variables.tf
index 7a1ea058e9..67d0ec4d31 100644
--- a/terraform/infrastructure/aws/variables.tf
+++ b/terraform/infrastructure/aws/variables.tf
@@ -82,5 +82,6 @@ variable "enable_snp" {
 
 variable "additional_tags" {
   type        = map(any)
+  default     = {}
   description = "Additional tags that should be applied to created resources."
 }
diff --git a/terraform/infrastructure/azure/variables.tf b/terraform/infrastructure/azure/variables.tf
index 03fbf921e4..577cdd4f0b 100644
--- a/terraform/infrastructure/azure/variables.tf
+++ b/terraform/infrastructure/azure/variables.tf
@@ -92,5 +92,6 @@ variable "marketplace_image" {
 
 variable "additional_tags" {
   type        = map(any)
+  default     = {}
   description = "Additional tags that should be applied to created resources."
 }
diff --git a/terraform/infrastructure/gcp/variables.tf b/terraform/infrastructure/gcp/variables.tf
index 3be31c6afd..601394a557 100644
--- a/terraform/infrastructure/gcp/variables.tf
+++ b/terraform/infrastructure/gcp/variables.tf
@@ -72,5 +72,6 @@ variable "cc_technology" {
 
 variable "additional_labels" {
   type        = map(any)
+  default     = {}
   description = "Additional labels that should be given to created recources."
 }
diff --git a/terraform/infrastructure/openstack/variables.tf b/terraform/infrastructure/openstack/variables.tf
index 4f68c7a4ad..12242f08b1 100644
--- a/terraform/infrastructure/openstack/variables.tf
+++ b/terraform/infrastructure/openstack/variables.tf
@@ -61,6 +61,7 @@ variable "floating_ip_pool_id" {
 
 variable "additional_tags" {
   type        = list(any)
+  default     = []
   description = "Additional tags that should be applied to created resources."
 }