diff --git a/.gitignore b/.gitignore
index 5a6b76e..b9b796d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 **/.terraform/*
 terraform.tfstate.d/
 logs/ 
+.terraform.lock.hcl
 
 # Variable files
 terraform.tfvars
diff --git a/Dockerfile b/Dockerfile
index 977c3e4..91c54da 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # Pull the base image with given version.
-ARG BUILD_TERRAFORM_VERSION="0.12.20"
-FROM mcr.microsoft.com/terraform-test:${BUILD_TERRAFORM_VERSION}
+ARG BUILD_TERRAFORM_VERSION="0.14.4"
+FROM jcorioland/terraform-test:${BUILD_TERRAFORM_VERSION}
 
 ARG MODULE_NAME="terraform-azure-devops-eagent-aci"
 
@@ -21,10 +21,7 @@ ENV ARM_TEST_LOCATION=${BUILD_ARM_TEST_LOCATION}
 ENV ARM_TEST_LOCATION_ALT=${BUILD_ARM_TEST_LOCATION_ALT}
 
 # Set work directory.
-RUN mkdir /go
-RUN mkdir /go/bin
-RUN mkdir /go/src
-RUN mkdir /go/src/${MODULE_NAME}
+RUN mkdir -p /go/src/${MODULE_NAME}
 COPY . /go/src/${MODULE_NAME}
 WORKDIR /go/src/${MODULE_NAME}
 
diff --git a/azure-pipeline.yaml b/azure-pipeline.yaml
index 9433ce9..bedb7b2 100644
--- a/azure-pipeline.yaml
+++ b/azure-pipeline.yaml
@@ -1,15 +1,18 @@
 # Azure Pipeline that runs module integration tests
 
-trigger: none
+trigger:
+- master
+pr:
+- master
 
 variables:
 - group: AzureDevOpsACI.Secrets
 - name: dockerImage
   value: 'terraform-azure-devops-aci'
 - name: terraformVersion
-  value: 0.12.25
+  value: 0.14.4
 - name: vmImage
-  value: ubuntu-latest
+  value: ubuntu-18.04
 - name: serviceConnection
   value: "terraform-azure-devops-aci"
 
@@ -43,7 +46,7 @@ stages:
           repository: $(dockerImage)
           dockerfile: '$(System.DefaultWorkingDirectory)/Dockerfile'
           buildContext: $(System.DefaultWorkingDirectory)
-          arguments: --build-arg BUILD_ARM_SUBSCRIPTION_ID=$(ARM_SUBSCRIPTION_ID) --build-arg BUILD_ARM_CLIENT_ID=$(ARM_CLIENT_ID) --build-arg BUILD_ARM_CLIENT_SECRET=$(ARM_CLIENT_SECRET) --build-arg BUILD_ARM_TENANT_ID=$(ARM_TENANT_ID)
+          arguments: --build-arg BUILD_ARM_SUBSCRIPTION_ID=$(ARM_SUBSCRIPTION_ID) --build-arg BUILD_ARM_CLIENT_ID=$(ARM_CLIENT_ID) --build-arg BUILD_ARM_CLIENT_SECRET=$(ARM_CLIENT_SECRET) --build-arg BUILD_ARM_TENANT_ID=$(ARM_TENANT_ID) --build-arg BUILD_TERRAFORM_VERSION=$(terraformVersion)
           tags: |
             $(Build.BuildId)
       - script: |
diff --git a/provider.tf b/provider.tf
deleted file mode 100644
index 615cb43..0000000
--- a/provider.tf
+++ /dev/null
@@ -1,3 +0,0 @@
-provider "azurerm" {
-  features {}
-}
\ No newline at end of file
diff --git a/test/azure_devops_agent_aci_test.go b/test/azure_devops_agent_aci_test.go
index a204c14..223f0be 100644
--- a/test/azure_devops_agent_aci_test.go
+++ b/test/azure_devops_agent_aci_test.go
@@ -94,6 +94,8 @@ func TestDeployAzureDevOpsLinuxAgentsInVirtualNetwork(t *testing.T) {
 	devopsPoolName := os.Getenv("TF_VAR_azure_devops_pool_name")
 	testPoolName := fmt.Sprintf("%s-%s", devopsPoolName, randomSuffix)
 	os.Setenv("TF_VAR_azure_devops_pool_name", testPoolName)
+	// reset env var after test
+	defer os.Setenv("TF_VAR_azure_devops_pool_name", devopsPoolName)
 
 	devopsOrganizationName := os.Getenv("TF_VAR_azure_devops_org_name")
 	devopsPersonalAccessToken := os.Getenv("TF_VAR_azure_devops_personal_access_token")
diff --git a/test/fixture/linux-agents-import-rg/main.tf b/test/fixture/linux-agents-import-rg/main.tf
index ac8caaf..3a41940 100644
--- a/test/fixture/linux-agents-import-rg/main.tf
+++ b/test/fixture/linux-agents-import-rg/main.tf
@@ -4,9 +4,9 @@ resource "azurerm_resource_group" "rg" {
 }
 
 module "aci-devops-agent" {
-  source                    = "../../../"
-  enable_vnet_integration   = false
-  create_resource_group = false
+  source                  = "../../../"
+  enable_vnet_integration = false
+  create_resource_group   = false
   linux_agents_configuration = {
     agent_name_prefix = "linuxagent-${var.random_suffix}"
     count             = var.agents_count
@@ -20,4 +20,5 @@ module "aci-devops-agent" {
   location                           = azurerm_resource_group.rg.location
   azure_devops_org_name              = var.azure_devops_org_name
   azure_devops_personal_access_token = var.azure_devops_personal_access_token
+  depends_on                         = [azurerm_resource_group.rg]
 }
\ No newline at end of file
diff --git a/test/fixture/linux-agents-import-rg/provider.tf b/test/fixture/linux-agents-import-rg/provider.tf
index 615cb43..49f3ab5 100644
--- a/test/fixture/linux-agents-import-rg/provider.tf
+++ b/test/fixture/linux-agents-import-rg/provider.tf
@@ -1,3 +1,12 @@
+terraform {
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = ">= 2.0"
+    }
+  }
+}
+
 provider "azurerm" {
   features {}
 }
\ No newline at end of file
diff --git a/test/fixture/linux-agents-import-rg/variables.tf b/test/fixture/linux-agents-import-rg/variables.tf
index a4ab247..462e34d 100644
--- a/test/fixture/linux-agents-import-rg/variables.tf
+++ b/test/fixture/linux-agents-import-rg/variables.tf
@@ -1,43 +1,43 @@
-variable azure_devops_org_name {
+variable "azure_devops_org_name" {
   type        = string
   description = "The name of the Azure DevOps organization in which the containerized agents will be deployed (e.g. https://dev.azure.com/YOUR_ORGANIZATION_NAME, must exist)"
 }
 
-variable azure_devops_pool_name {
+variable "azure_devops_pool_name" {
   type        = string
   description = "The name of the Azure DevOps agent pool in which the containerized agents will be deployed (must exist)"
 }
 
-variable azure_devops_personal_access_token {
+variable "azure_devops_personal_access_token" {
   type        = string
   description = "The personal access token to use to connect to Azure DevOps (see https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/v2-windows?view=azure-devops#permissions)"
 }
 
-variable location {
+variable "location" {
   type        = string
   description = "The Azure location to use"
   default     = "westeurope"
 }
 
-variable agent_docker_image {
+variable "agent_docker_image" {
   type        = string
   description = "The Docker image to use for the Linux agent"
   default     = "jcorioland/aci-devops-agent"
 }
 
-variable agent_docker_tag {
+variable "agent_docker_tag" {
   type        = string
   description = "The Docker tag to use for the Linux agent"
   default     = "0.2-linux"
 }
 
-variable agents_count {
+variable "agents_count" {
   type        = number
   description = "The number of agents to create"
   default     = 2
 }
 
-variable random_suffix {
+variable "random_suffix" {
   type        = number
   description = "A random suffix for resources generated during the test"
 }
\ No newline at end of file
diff --git a/test/fixture/linux-agents-private-registry/provider.tf b/test/fixture/linux-agents-private-registry/provider.tf
index 615cb43..49f3ab5 100644
--- a/test/fixture/linux-agents-private-registry/provider.tf
+++ b/test/fixture/linux-agents-private-registry/provider.tf
@@ -1,3 +1,12 @@
+terraform {
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = ">= 2.0"
+    }
+  }
+}
+
 provider "azurerm" {
   features {}
 }
\ No newline at end of file
diff --git a/test/fixture/linux-agents-private-registry/variables.tf b/test/fixture/linux-agents-private-registry/variables.tf
index 72a582d..0bad889 100644
--- a/test/fixture/linux-agents-private-registry/variables.tf
+++ b/test/fixture/linux-agents-private-registry/variables.tf
@@ -1,58 +1,58 @@
-variable azure_devops_org_name {
+variable "azure_devops_org_name" {
   type        = string
   description = "The name of the Azure DevOps organization in which the containerized agents will be deployed (e.g. https://dev.azure.com/YOUR_ORGANIZATION_NAME, must exist)"
 }
 
-variable azure_devops_pool_name {
+variable "azure_devops_pool_name" {
   type        = string
   description = "The name of the Azure DevOps agent pool in which the containerized agents will be deployed (must exist)"
 }
 
-variable azure_devops_personal_access_token {
+variable "azure_devops_personal_access_token" {
   type        = string
   description = "The personal access token to use to connect to Azure DevOps (see https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/v2-windows?view=azure-devops#permissions)"
 }
 
-variable location {
+variable "location" {
   type        = string
   description = "The Azure location to use"
   default     = "westeurope"
 }
 
-variable agent_docker_image {
+variable "agent_docker_image" {
   type        = string
   description = "The Docker image to use for the Linux agent"
   default     = "jcorioland/aci-devops-agent"
 }
 
-variable agent_docker_tag {
+variable "agent_docker_tag" {
   type        = string
   description = "The Docker tag to use for the Linux agent"
   default     = "0.2-linux"
 }
 
-variable agents_count {
+variable "agents_count" {
   type        = number
   description = "The number of agents to create"
   default     = 2
 }
 
-variable random_suffix {
+variable "random_suffix" {
   type        = number
   description = "A random suffix for resources generated during the test"
 }
 
-variable docker_registry_url {
+variable "docker_registry_url" {
   type        = string
   description = "The server URL of the Docker private registry"
 }
 
-variable docker_registry_username {
+variable "docker_registry_username" {
   type        = string
   description = "The username of the Docker private registry"
 }
 
-variable docker_registry_password {
+variable "docker_registry_password" {
   type        = string
   description = "The password of the Docker private registry"
 }
\ No newline at end of file
diff --git a/test/fixture/linux-agents-vnet/main.tf b/test/fixture/linux-agents-vnet/main.tf
index 6753608..d7c527d 100644
--- a/test/fixture/linux-agents-vnet/main.tf
+++ b/test/fixture/linux-agents-vnet/main.tf
@@ -27,12 +27,12 @@ resource "azurerm_subnet" "aci-subnet" {
 }
 
 module "aci-devops-agent" {
-  source                    = "../../../"
-  enable_vnet_integration   = true
-  create_resource_group = true
-  vnet_resource_group_name  = azurerm_resource_group.vnet-rg.name
-  vnet_name                 = azurerm_virtual_network.vnet.name
-  subnet_name               = azurerm_subnet.aci-subnet.name
+  source                   = "../../../"
+  enable_vnet_integration  = true
+  create_resource_group    = true
+  vnet_resource_group_name = azurerm_resource_group.vnet-rg.name
+  vnet_name                = azurerm_virtual_network.vnet.name
+  subnet_name              = azurerm_subnet.aci-subnet.name
   linux_agents_configuration = {
     agent_name_prefix = "linuxagent-${var.random_suffix}"
     count             = var.agents_count
@@ -46,4 +46,5 @@ module "aci-devops-agent" {
   location                           = var.location
   azure_devops_org_name              = var.azure_devops_org_name
   azure_devops_personal_access_token = var.azure_devops_personal_access_token
+  depends_on                         = [azurerm_subnet.aci-subnet]
 }
\ No newline at end of file
diff --git a/test/fixture/linux-agents-vnet/provider.tf b/test/fixture/linux-agents-vnet/provider.tf
index 615cb43..49f3ab5 100644
--- a/test/fixture/linux-agents-vnet/provider.tf
+++ b/test/fixture/linux-agents-vnet/provider.tf
@@ -1,3 +1,12 @@
+terraform {
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = ">= 2.0"
+    }
+  }
+}
+
 provider "azurerm" {
   features {}
 }
\ No newline at end of file
diff --git a/test/fixture/linux-agents-vnet/variables.tf b/test/fixture/linux-agents-vnet/variables.tf
index 87bfa7f..1d0152e 100644
--- a/test/fixture/linux-agents-vnet/variables.tf
+++ b/test/fixture/linux-agents-vnet/variables.tf
@@ -1,43 +1,43 @@
-variable azure_devops_org_name {
+variable "azure_devops_org_name" {
   type        = string
   description = "The name of the Azure DevOps organization in which the containerized agents will be deployed (e.g. https://dev.azure.com/YOUR_ORGANIZATION_NAME, must exist)"
 }
 
-variable azure_devops_pool_name {
+variable "azure_devops_pool_name" {
   type        = string
   description = "The name of the Azure DevOps agent pool in which the containerized agents will be deployed (must exist)"
 }
 
-variable azure_devops_personal_access_token {
+variable "azure_devops_personal_access_token" {
   type        = string
   description = "The personal access token to use to connect to Azure DevOps (see https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/v2-windows?view=azure-devops#permissions)"
 }
 
-variable location {
+variable "location" {
   type        = string
   description = "The Azure location to use"
   default     = "westus"
 }
 
-variable agent_docker_image {
+variable "agent_docker_image" {
   type        = string
   description = "The Docker image to use for the Linux agent"
   default     = "jcorioland/aci-devops-agent"
 }
 
-variable agent_docker_tag {
+variable "agent_docker_tag" {
   type        = string
   description = "The Docker tag to use for the Linux agent"
   default     = "0.2-linux"
 }
 
-variable agents_count {
+variable "agents_count" {
   type        = number
   description = "The number of agents to create"
   default     = 2
 }
 
-variable random_suffix {
+variable "random_suffix" {
   type        = number
   description = "A random suffix for resources generated during the test"
 }
\ No newline at end of file
diff --git a/test/fixture/linux-agents/main.tf b/test/fixture/linux-agents/main.tf
index 865c5e5..fb2c701 100644
--- a/test/fixture/linux-agents/main.tf
+++ b/test/fixture/linux-agents/main.tf
@@ -1,7 +1,7 @@
 module "aci-devops-agent" {
-  source                    = "../../../"
-  enable_vnet_integration   = false
-  create_resource_group = true
+  source                  = "../../../"
+  enable_vnet_integration = false
+  create_resource_group   = true
   linux_agents_configuration = {
     agent_name_prefix = "linuxagent-${var.random_suffix}"
     count             = var.agents_count
diff --git a/test/fixture/linux-agents/provider.tf b/test/fixture/linux-agents/provider.tf
index 615cb43..49f3ab5 100644
--- a/test/fixture/linux-agents/provider.tf
+++ b/test/fixture/linux-agents/provider.tf
@@ -1,3 +1,12 @@
+terraform {
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = ">= 2.0"
+    }
+  }
+}
+
 provider "azurerm" {
   features {}
 }
\ No newline at end of file
diff --git a/test/fixture/linux-agents/variables.tf b/test/fixture/linux-agents/variables.tf
index a4ab247..462e34d 100644
--- a/test/fixture/linux-agents/variables.tf
+++ b/test/fixture/linux-agents/variables.tf
@@ -1,43 +1,43 @@
-variable azure_devops_org_name {
+variable "azure_devops_org_name" {
   type        = string
   description = "The name of the Azure DevOps organization in which the containerized agents will be deployed (e.g. https://dev.azure.com/YOUR_ORGANIZATION_NAME, must exist)"
 }
 
-variable azure_devops_pool_name {
+variable "azure_devops_pool_name" {
   type        = string
   description = "The name of the Azure DevOps agent pool in which the containerized agents will be deployed (must exist)"
 }
 
-variable azure_devops_personal_access_token {
+variable "azure_devops_personal_access_token" {
   type        = string
   description = "The personal access token to use to connect to Azure DevOps (see https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/v2-windows?view=azure-devops#permissions)"
 }
 
-variable location {
+variable "location" {
   type        = string
   description = "The Azure location to use"
   default     = "westeurope"
 }
 
-variable agent_docker_image {
+variable "agent_docker_image" {
   type        = string
   description = "The Docker image to use for the Linux agent"
   default     = "jcorioland/aci-devops-agent"
 }
 
-variable agent_docker_tag {
+variable "agent_docker_tag" {
   type        = string
   description = "The Docker tag to use for the Linux agent"
   default     = "0.2-linux"
 }
 
-variable agents_count {
+variable "agents_count" {
   type        = number
   description = "The number of agents to create"
   default     = 2
 }
 
-variable random_suffix {
+variable "random_suffix" {
   type        = number
   description = "A random suffix for resources generated during the test"
 }
\ No newline at end of file
diff --git a/test/fixture/linux-and-windows-agents/main.tf b/test/fixture/linux-and-windows-agents/main.tf
index d39fa52..ae2b270 100644
--- a/test/fixture/linux-and-windows-agents/main.tf
+++ b/test/fixture/linux-and-windows-agents/main.tf
@@ -1,7 +1,7 @@
 module "aci-devops-agent" {
-  source                    = "../../../"
-  enable_vnet_integration   = false
-  create_resource_group = true
+  source                  = "../../../"
+  enable_vnet_integration = false
+  create_resource_group   = true
   linux_agents_configuration = {
     agent_name_prefix = "linux-agent-${var.random_suffix}"
     count             = 2,
diff --git a/test/fixture/linux-and-windows-agents/provider.tf b/test/fixture/linux-and-windows-agents/provider.tf
index 615cb43..49f3ab5 100644
--- a/test/fixture/linux-and-windows-agents/provider.tf
+++ b/test/fixture/linux-and-windows-agents/provider.tf
@@ -1,3 +1,12 @@
+terraform {
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = ">= 2.0"
+    }
+  }
+}
+
 provider "azurerm" {
   features {}
 }
\ No newline at end of file
diff --git a/test/fixture/linux-and-windows-agents/variables.tf b/test/fixture/linux-and-windows-agents/variables.tf
index 0551c60..4f7157a 100644
--- a/test/fixture/linux-and-windows-agents/variables.tf
+++ b/test/fixture/linux-and-windows-agents/variables.tf
@@ -1,62 +1,62 @@
-variable azure_devops_org_name {
+variable "azure_devops_org_name" {
   type        = string
   description = "The name of the Azure DevOps organization in which the containerized agents will be deployed (e.g. https://dev.azure.com/YOUR_ORGANIZATION_NAME, must exist)"
 }
 
-variable azure_devops_personal_access_token {
+variable "azure_devops_personal_access_token" {
   type        = string
   description = "The personal access token to use to connect to Azure DevOps (see https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/v2-windows?view=azure-devops#permissions)"
 }
 
-variable linux_azure_devops_pool_name {
+variable "linux_azure_devops_pool_name" {
   type        = string
   description = "The name of the Azure DevOps agent pool in which the linux containerized agents will be deployed (must exist)"
   default     = "linux-e2e-agents"
 }
 
-variable windows_azure_devops_pool_name {
+variable "windows_azure_devops_pool_name" {
   type        = string
   description = "The name of the Azure DevOps agent pool in which the windows containerized agents will be deployed (must exist)"
   default     = "windows-e2e-agents"
 }
 
-variable location {
+variable "location" {
   type        = string
   description = "The Azure location to use"
   default     = "westeurope"
 }
 
-variable linux_agent_docker_image {
+variable "linux_agent_docker_image" {
   type        = string
   description = "The Docker image to use for the Linux agent"
   default     = "jcorioland/aci-devops-agent"
 }
 
-variable linux_agent_docker_tag {
+variable "linux_agent_docker_tag" {
   type        = string
   description = "The Docker tag to use for the Linux agent"
   default     = "0.2-linux"
 }
 
-variable windows_agent_docker_image {
+variable "windows_agent_docker_image" {
   type        = string
   description = "The Docker image to use for the Windows agent"
   default     = "jcorioland/aci-devops-agent"
 }
 
-variable windows_agent_docker_tag {
+variable "windows_agent_docker_tag" {
   type        = string
   description = "The Docker tag to use for the Windows agent"
   default     = "0.2-win"
 }
 
-variable agents_count {
+variable "agents_count" {
   type        = number
   description = "The number of agents to create"
   default     = 2
 }
 
-variable random_suffix {
+variable "random_suffix" {
   type        = number
   description = "A random suffix for resources generated during the test"
 }
\ No newline at end of file
diff --git a/variables.tf b/variables.tf
index f22c145..ce6aba6 100644
--- a/variables.tf
+++ b/variables.tf
@@ -1,54 +1,54 @@
-variable resource_group_name {
+variable "resource_group_name" {
   type        = string
   description = "The name of the resource group in which the containerized agents will be deployed"
 }
 
-variable location {
+variable "location" {
   type        = string
   description = "The Azure location to use for deployment"
 }
 
-variable create_resource_group {
+variable "create_resource_group" {
   type        = bool
   default     = true
   description = "(Optional) A flag that indicates if the resource group in which the agents will be deployed must be created (true) or imported (false)."
 }
 
-variable enable_vnet_integration {
+variable "enable_vnet_integration" {
   type        = bool
   default     = false
   description = "(Optional) A flag that indicates if the containerized agents must be deployed into an existing virtual network"
 }
 
-variable vnet_resource_group_name {
+variable "vnet_resource_group_name" {
   type        = string
   default     = ""
   description = "(Optional) The name of the resource group that contains the virtual network in which the containerized agents will be deployed"
 }
 
-variable vnet_name {
+variable "vnet_name" {
   type        = string
   default     = ""
   description = "(Optional) The name of the virtual network in which the containerized agents will be deployed"
 }
 
-variable subnet_name {
+variable "subnet_name" {
   type        = string
   default     = ""
   description = "(Optional) The name of the subnet of the vnet in which the containerized agents will be deployed"
 }
 
-variable azure_devops_org_name {
+variable "azure_devops_org_name" {
   type        = string
   description = "The name of the Azure DevOps organization in which the containerized agents will be deployed (e.g. https://dev.azure.com/YOUR_ORGANIZATION_NAME, must exist)"
 }
 
-variable azure_devops_personal_access_token {
+variable "azure_devops_personal_access_token" {
   type        = string
   description = "The personal access token to use to connect to Azure DevOps (see https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/v2-windows?view=azure-devops#permissions)"
 }
 
-variable linux_agents_configuration {
+variable "linux_agents_configuration" {
   type = object({
     count             = string,
     docker_image      = string,
@@ -70,7 +70,7 @@ variable linux_agents_configuration {
   }
 }
 
-variable windows_agents_configuration {
+variable "windows_agents_configuration" {
   type = object({
     count             = string,
     docker_image      = string,
@@ -92,7 +92,7 @@ variable windows_agents_configuration {
   }
 }
 
-variable image_registry_credential {
+variable "image_registry_credential" {
   type = object({
     username = string,
     password = string,