diff --git a/modules/eks-cluster/README.md b/modules/eks-cluster/README.md
index 18021d69..dfa3f03c 100644
--- a/modules/eks-cluster/README.md
+++ b/modules/eks-cluster/README.md
@@ -92,6 +92,7 @@ module "eks_cluster" {
 | <a name="output_private_subnet_ids"></a> [private\_subnet\_ids](#output\_private\_subnet\_ids) | Private subnet IDs |
 | <a name="output_private_vpc_cidr_blocks"></a> [private\_vpc\_cidr\_blocks](#output\_private\_vpc\_cidr\_blocks) | Private VPC CIDR blocks |
 | <a name="output_public_vpc_cidr_blocks"></a> [public\_vpc\_cidr\_blocks](#output\_public\_vpc\_cidr\_blocks) | Public VPC CIDR blocks |
+| <a name="output_vpc_azs"></a> [vpc\_azs](#output\_vpc\_azs) | VPC AZs of the cluster |
 | <a name="output_vpc_id"></a> [vpc\_id](#output\_vpc\_id) | VPC id of the cluster |
 | <a name="output_vpc_main_route_table_id"></a> [vpc\_main\_route\_table\_id](#output\_vpc\_main\_route\_table\_id) | The ID of the main route table associated with this VPC |
 <!-- END_TF_DOCS -->
diff --git a/modules/eks-cluster/outputs.tf b/modules/eks-cluster/outputs.tf
index 8a7c2174..a56bcfc4 100644
--- a/modules/eks-cluster/outputs.tf
+++ b/modules/eks-cluster/outputs.tf
@@ -96,6 +96,11 @@ output "vpc_id" {
   value       = module.vpc.vpc_id
 }
 
+output "vpc_azs" {
+  description = "VPC AZs of the cluster"
+  value       = module.vpc.azs
+}
+
 output "private_vpc_cidr_blocks" {
   value       = module.vpc.private_subnets_cidr_blocks
   description = "Private VPC CIDR blocks"
diff --git a/test/src/custom_eks_opensearch_test.go b/test/src/custom_eks_opensearch_test.go
index f27b6371..e24f7abd 100644
--- a/test/src/custom_eks_opensearch_test.go
+++ b/test/src/custom_eks_opensearch_test.go
@@ -85,6 +85,8 @@ func (suite *CustomEKSOpenSearchTestSuite) TestCustomEKSAndOpenSearch() {
 		"name":                  suite.clusterName,
 		"region":                suite.region,
 		"np_desired_node_count": suite.expectedNodes,
+		// we test the usage of a single zone
+		"availability_zones_count": 1,
 	}
 
 	suite.sugaredLogger.Infow("Creating EKS cluster...", "extraVars", suite.varTf)
@@ -126,6 +128,9 @@ func (suite *CustomEKSOpenSearchTestSuite) TestCustomEKSAndOpenSearch() {
 	// idempotency test
 	terraform.InitAndApply(suite.T(), terraformOptions)
 
+	expectedVpcAZs := fmt.Sprintf("[%sa]", suite.varTf["region"]) // must match availability_zones_count, by default it's the first zone
+	suite.Assert().Equal(expectedVpcAZs, terraform.Output(suite.T(), terraformOptions, "vpc_azs"))
+
 	sess, err := utils.GetAwsClient()
 	suite.Require().NoErrorf(err, "Failed to get aws client")
 
diff --git a/test/src/custom_eks_rds_test.go b/test/src/custom_eks_rds_test.go
index f23e1e71..bc30dbb3 100644
--- a/test/src/custom_eks_rds_test.go
+++ b/test/src/custom_eks_rds_test.go
@@ -84,6 +84,8 @@ func (suite *CustomEKSRDSTestSuite) TestCustomEKSAndRDS() {
 		"name":                  suite.clusterName,
 		"region":                suite.region,
 		"np_desired_node_count": suite.expectedNodes,
+		// we test the definition of specific AZs
+		"availability_zones": string{fmt.Sprintf("%sb", suite.region), fmt.Sprintf("%sc", suite.region)},
 	}
 
 	suite.sugaredLogger.Infow("Creating EKS cluster...", "extraVars", suite.varTf)
@@ -125,6 +127,10 @@ func (suite *CustomEKSRDSTestSuite) TestCustomEKSAndRDS() {
 	// idempotency test
 	terraform.InitAndApply(suite.T(), terraformOptions)
 
+	// basic tests after terraform apply
+	expectedVpcAZs := fmt.Sprintf("[%sb %sc]", suite.varTf["region"], suite.varTf["region"])
+	suite.Assert().Equal(expectedVpcAZs, terraform.Output(suite.T(), terraformOptions, "vpc_azs"))
+
 	sess, err := utils.GetAwsClient()
 	suite.Require().NoErrorf(err, "Failed to get aws client")
 
diff --git a/test/src/default_eks_test.go b/test/src/default_eks_test.go
index 9d2907c6..8a74ae3c 100644
--- a/test/src/default_eks_test.go
+++ b/test/src/default_eks_test.go
@@ -141,6 +141,7 @@ func (suite *DefaultEKSTestSuite) baseChecksEKS(terraformOptions *terraform.Opti
 	suite.Assert().NotEmpty(terraform.Output(suite.T(), terraformOptions, "ebs_cs_arn"))
 	suite.Assert().NotEmpty(terraform.Output(suite.T(), terraformOptions, "external_dns_arn"))
 	suite.Assert().NotEmpty(terraform.Output(suite.T(), terraformOptions, "vpc_id"))
+	suite.Assert().NotEmpty(terraform.Output(suite.T(), terraformOptions, "vpc_azs"))
 	suite.Assert().NotEmpty(terraform.Output(suite.T(), terraformOptions, "private_vpc_cidr_blocks"))
 	suite.Assert().NotEmpty(terraform.Output(suite.T(), terraformOptions, "private_subnet_ids"))
 	suite.Assert().NotEmpty(terraform.Output(suite.T(), terraformOptions, "default_security_group_id"))
@@ -159,6 +160,9 @@ func (suite *DefaultEKSTestSuite) baseChecksEKS(terraformOptions *terraform.Opti
 	expectedPublicVpcCidrBlocks := "[10.192.96.0/19 10.192.128.0/19 10.192.160.0/19]"
 	suite.Assert().Equal(expectedPublicVpcCidrBlocks, terraform.Output(suite.T(), terraformOptions, "public_vpc_cidr_blocks"))
 
+	expectedVpcAZs := fmt.Sprintf("[%sa %sb %sc]", suite.varTf["region"], suite.varTf["region"], suite.varTf["region"])
+	suite.Assert().Equal(expectedVpcAZs, terraform.Output(suite.T(), terraformOptions, "vpc_azs"))
+
 	sess, err := utils.GetAwsClient()
 	suite.Require().NoErrorf(err, "Failed to get aws client")