diff --git a/testing/benchmarking/main.tf b/testing/benchmarking/main.tf
index 9cb05511..eb8a5dab 100644
--- a/testing/benchmarking/main.tf
+++ b/testing/benchmarking/main.tf
@@ -49,7 +49,7 @@ provider "aws" {
 module "tags" {
   source  = "github.com/elastic/apm-server//testing/infra/terraform/modules/tags?depth=1"
   project = "lambda-extension-benchmarks"
-  build   = vars.github_workflow_id
+  build   = var.github_workflow_id
 }
 
 module "ec_deployment" {
diff --git a/testing/smoketest/main.tf b/testing/smoketest/main.tf
index 3209fe29..bac8653b 100644
--- a/testing/smoketest/main.tf
+++ b/testing/smoketest/main.tf
@@ -8,7 +8,7 @@ provider "aws" {
 module "tags" {
   source  = "github.com/elastic/apm-server//testing/infra/terraform/modules/tags?depth=1"
   project = local.user_name
-  build   = vars.github_workflow_id
+  build   = var.github_workflow_id
 }
 
 module "ec_deployment" {