diff --git a/envs/monkey_zoo/terraform/config.tf b/envs/monkey_zoo/terraform/config.tf
index 3a2bf0fc4..5396f424c 100644
--- a/envs/monkey_zoo/terraform/config.tf
+++ b/envs/monkey_zoo/terraform/config.tf
@@ -2,7 +2,7 @@ provider "google" {
   project = "test-000000"
   region  = "europe-west3"
   zone    = "europe-west3-b"
-  credentials = "${file("../gcp_keys/gcp_key.json")}"
+  credentials = file("../gcp_keys/gcp_key.json")
 }
 locals {
   resource_prefix = ""
diff --git a/envs/monkey_zoo/terraform/firewalls.tf b/envs/monkey_zoo/terraform/firewalls.tf
index afd99a347..a331125c4 100644
--- a/envs/monkey_zoo/terraform/firewalls.tf
+++ b/envs/monkey_zoo/terraform/firewalls.tf
@@ -1,6 +1,6 @@
 resource "google_compute_firewall" "islands-in" {
   name    = "${local.resource_prefix}islands-in"
-  network = "${google_compute_network.monkeyzoo.name}"
+  network = google_compute_network.monkeyzoo.name
 
   allow {
     protocol = "tcp"
@@ -14,7 +14,7 @@ resource "google_compute_firewall" "islands-in" {
 
 resource "google_compute_firewall" "islands-out" {
   name    = "${local.resource_prefix}islands-out"
-  network = "${google_compute_network.monkeyzoo.name}"
+  network = google_compute_network.monkeyzoo.name
 
   allow {
     protocol = "tcp"
@@ -27,7 +27,7 @@ resource "google_compute_firewall" "islands-out" {
 
 resource "google_compute_firewall" "monkeyzoo-in" {
   name    = "${local.resource_prefix}monkeyzoo-in"
-  network = "${google_compute_network.monkeyzoo.name}"
+  network = google_compute_network.monkeyzoo.name
 
   allow {
     protocol = "all"
@@ -40,7 +40,7 @@ resource "google_compute_firewall" "monkeyzoo-in" {
 
 resource "google_compute_firewall" "monkeyzoo-out" {
   name    = "${local.resource_prefix}monkeyzoo-out"
-  network = "${google_compute_network.monkeyzoo.name}"
+  network = google_compute_network.monkeyzoo.name
 
   allow {
     protocol = "all"
@@ -53,7 +53,7 @@ resource "google_compute_firewall" "monkeyzoo-out" {
 
 resource "google_compute_firewall" "tunneling-in" {
   name    = "${local.resource_prefix}tunneling-in"
-  network = "${google_compute_network.tunneling.name}"
+  network = google_compute_network.tunneling.name
 
   allow {
     protocol = "all"
@@ -65,7 +65,7 @@ resource "google_compute_firewall" "tunneling-in" {
 
 resource "google_compute_firewall" "tunneling-out" {
   name    = "${local.resource_prefix}tunneling-out"
-  network = "${google_compute_network.tunneling.name}"
+  network = google_compute_network.tunneling.name
 
   allow {
     protocol = "all"
@@ -77,7 +77,7 @@ resource "google_compute_firewall" "tunneling-out" {
 
 resource "google_compute_firewall" "tunneling2-in" {
   name    = "${local.resource_prefix}tunneling2-in"
-  network = "${google_compute_network.tunneling2.name}"
+  network = google_compute_network.tunneling2.name
 
   allow {
     protocol = "all"
@@ -89,7 +89,7 @@ resource "google_compute_firewall" "tunneling2-in" {
 
 resource "google_compute_firewall" "tunneling2-out" {
   name    = "${local.resource_prefix}tunneling2-out"
-  network = "${google_compute_network.tunneling2.name}"
+  network = google_compute_network.tunneling2.name
 
   allow {
     protocol = "all"
diff --git a/envs/monkey_zoo/terraform/images.tf b/envs/monkey_zoo/terraform/images.tf
index dccbe16dd..4c01ff4d2 100644
--- a/envs/monkey_zoo/terraform/images.tf
+++ b/envs/monkey_zoo/terraform/images.tf
@@ -1,19 +1,19 @@
 //Custom cloud images
 data "google_compute_image" "hadoop-2" {
   name = "hadoop-2"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "hadoop-3" {
   name = "hadoop-3"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "elastic-4" {
   name = "elastic-4"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "elastic-5" {
   name = "elastic-5"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 
 /*
@@ -23,73 +23,73 @@ data "google_compute_image" "sambacry-6" {
 */
 data "google_compute_image" "shellshock-8" {
   name = "shellshock-8"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "tunneling-9" {
   name = "tunneling-9"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "tunneling-10" {
   name = "tunneling-10"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "tunneling-11" {
   name = "tunneling-11"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "sshkeys-11" {
   name = "sshkeys-11"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "sshkeys-12" {
   name = "sshkeys-12"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "mimikatz-14" {
   name = "mimikatz-14"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "mimikatz-15" {
   name = "mimikatz-15"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "mssql-16" {
   name = "mssql-16"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "weblogic-18" {
   name = "weblogic-18"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "weblogic-19" {
   name = "weblogic-19"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "smb-20" {
   name = "smb-20"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "scan-21" {
   name = "scan-21"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "scan-22" {
   name = "scan-22"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "struts2-23" {
   name = "struts2-23"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "struts2-24" {
   name = "struts2-24"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "island-linux-250" {
   name = "island-linux-250"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
 data "google_compute_image" "island-windows-251" {
   name = "island-windows-251"
-  project = "${local.monkeyzoo_project}"
+  project = local.monkeyzoo_project
 }
diff --git a/envs/monkey_zoo/terraform/monkey_zoo.tf b/envs/monkey_zoo/terraform/monkey_zoo.tf
index cf45d93e0..30602f237 100644
--- a/envs/monkey_zoo/terraform/monkey_zoo.tf
+++ b/envs/monkey_zoo/terraform/monkey_zoo.tf
@@ -1,8 +1,8 @@
 
 // Local variables
 locals {
-  default_ubuntu="${google_compute_instance_template.ubuntu16.self_link}"
-  default_windows="${google_compute_instance_template.windows2016.self_link}"
+  default_ubuntu=google_compute_instance_template.ubuntu16.self_link
+  default_windows=google_compute_instance_template.windows2016.self_link
 }
 
 resource "google_compute_network" "monkeyzoo" {
@@ -23,27 +23,27 @@ resource "google_compute_network" "tunneling2" {
 resource "google_compute_subnetwork" "monkeyzoo-main" {
   name = "${local.resource_prefix}monkeyzoo-main"
   ip_cidr_range   = "10.2.2.0/24"
-  network         = "${google_compute_network.monkeyzoo.self_link}"
+  network         = google_compute_network.monkeyzoo.self_link
 }
 
 resource "google_compute_subnetwork" "tunneling-main" {
   name = "${local.resource_prefix}tunneling-main"
   ip_cidr_range   = "10.2.1.0/28"
-  network         = "${google_compute_network.tunneling.self_link}"
+  network         = google_compute_network.tunneling.self_link
 }
 
 resource "google_compute_subnetwork" "tunneling2-main" {
   name = "${local.resource_prefix}tunneling2-main"
   ip_cidr_range   = "10.2.0.0/27"
-  network         = "${google_compute_network.tunneling2.self_link}"
+  network         = google_compute_network.tunneling2.self_link
 }
 
 resource "google_compute_instance_from_template" "hadoop-2" {
   name = "${local.resource_prefix}hadoop-2"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.hadoop-2.self_link}"
+      image = data.google_compute_image.hadoop-2.self_link
     }
     auto_delete = true
   }
@@ -57,10 +57,10 @@ resource "google_compute_instance_from_template" "hadoop-2" {
 
 resource "google_compute_instance_from_template" "hadoop-3" {
   name = "${local.resource_prefix}hadoop-3"
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.hadoop-3.self_link}"
+      image = data.google_compute_image.hadoop-3.self_link
     }
     auto_delete = true
   }
@@ -72,10 +72,10 @@ resource "google_compute_instance_from_template" "hadoop-3" {
 
 resource "google_compute_instance_from_template" "elastic-4" {
   name = "${local.resource_prefix}elastic-4"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.elastic-4.self_link}"
+      image = data.google_compute_image.elastic-4.self_link
     }
     auto_delete = true
   }
@@ -87,10 +87,10 @@ resource "google_compute_instance_from_template" "elastic-4" {
 
 resource "google_compute_instance_from_template" "elastic-5" {
   name = "${local.resource_prefix}elastic-5"
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.elastic-5.self_link}"
+      image = data.google_compute_image.elastic-5.self_link
     }
     auto_delete = true
   }
@@ -135,10 +135,10 @@ resource "google_compute_instance_from_template" "sambacry-7" {
 
 resource "google_compute_instance_from_template" "shellshock-8" {
   name = "${local.resource_prefix}shellshock-8"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.shellshock-8.self_link}"
+      image = data.google_compute_image.shellshock-8.self_link
     }
     auto_delete = true
   }
@@ -150,10 +150,10 @@ resource "google_compute_instance_from_template" "shellshock-8" {
 
 resource "google_compute_instance_from_template" "tunneling-9" {
   name = "${local.resource_prefix}tunneling-9"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.tunneling-9.self_link}"
+      image = data.google_compute_image.tunneling-9.self_link
     }
     auto_delete = true
   }
@@ -169,10 +169,10 @@ resource "google_compute_instance_from_template" "tunneling-9" {
 
 resource "google_compute_instance_from_template" "tunneling-10" {
   name = "${local.resource_prefix}tunneling-10"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.tunneling-10.self_link}"
+      image = data.google_compute_image.tunneling-10.self_link
     }
     auto_delete = true
   }
@@ -188,10 +188,10 @@ resource "google_compute_instance_from_template" "tunneling-10" {
 
 resource "google_compute_instance_from_template" "tunneling-11" {
   name = "${local.resource_prefix}tunneling-11"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.tunneling-11.self_link}"
+      image = data.google_compute_image.tunneling-11.self_link
     }
     auto_delete = true
   }
@@ -203,10 +203,10 @@ resource "google_compute_instance_from_template" "tunneling-11" {
 
 resource "google_compute_instance_from_template" "sshkeys-11" {
   name = "${local.resource_prefix}sshkeys-11"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.sshkeys-11.self_link}"
+      image = data.google_compute_image.sshkeys-11.self_link
     }
     auto_delete = true
   }
@@ -218,10 +218,10 @@ resource "google_compute_instance_from_template" "sshkeys-11" {
 
 resource "google_compute_instance_from_template" "sshkeys-12" {
   name = "${local.resource_prefix}sshkeys-12"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.sshkeys-12.self_link}"
+      image = data.google_compute_image.sshkeys-12.self_link
     }
     auto_delete = true
   }
@@ -249,10 +249,10 @@ resource "google_compute_instance_from_template" "rdpgrinder-13" {
 
 resource "google_compute_instance_from_template" "mimikatz-14" {
   name = "${local.resource_prefix}mimikatz-14"
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.mimikatz-14.self_link}"
+      image = data.google_compute_image.mimikatz-14.self_link
     }
     auto_delete = true
   }
@@ -264,10 +264,10 @@ resource "google_compute_instance_from_template" "mimikatz-14" {
 
 resource "google_compute_instance_from_template" "mimikatz-15" {
   name = "${local.resource_prefix}mimikatz-15"
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.mimikatz-15.self_link}"
+      image = data.google_compute_image.mimikatz-15.self_link
     }
     auto_delete = true
   }
@@ -279,10 +279,10 @@ resource "google_compute_instance_from_template" "mimikatz-15" {
 
 resource "google_compute_instance_from_template" "mssql-16" {
   name = "${local.resource_prefix}mssql-16"
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.mssql-16.self_link}"
+      image = data.google_compute_image.mssql-16.self_link
     }
     auto_delete = true
   }
@@ -314,10 +314,10 @@ resource "google_compute_instance_from_template" "upgrader-17" {
 
 resource "google_compute_instance_from_template" "weblogic-18" {
   name = "${local.resource_prefix}weblogic-18"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.weblogic-18.self_link}"
+      image = data.google_compute_image.weblogic-18.self_link
     }
     auto_delete = true
   }
@@ -329,10 +329,10 @@ resource "google_compute_instance_from_template" "weblogic-18" {
 
 resource "google_compute_instance_from_template" "weblogic-19" {
   name = "${local.resource_prefix}weblogic-19"
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.weblogic-19.self_link}"
+      image = data.google_compute_image.weblogic-19.self_link
     }
     auto_delete = true
   }
@@ -344,10 +344,10 @@ resource "google_compute_instance_from_template" "weblogic-19" {
 
 resource "google_compute_instance_from_template" "smb-20" {
   name = "${local.resource_prefix}smb-20"
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.smb-20.self_link}"
+      image = data.google_compute_image.smb-20.self_link
     }
     auto_delete = true
   }
@@ -359,10 +359,10 @@ resource "google_compute_instance_from_template" "smb-20" {
 
 resource "google_compute_instance_from_template" "scan-21" {
   name = "${local.resource_prefix}scan-21"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.scan-21.self_link}"
+      image = data.google_compute_image.scan-21.self_link
     }
     auto_delete = true
   }
@@ -374,10 +374,10 @@ resource "google_compute_instance_from_template" "scan-21" {
 
 resource "google_compute_instance_from_template" "scan-22" {
   name = "${local.resource_prefix}scan-22"
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.scan-22.self_link}"
+      image = data.google_compute_image.scan-22.self_link
     }
     auto_delete = true
   }
@@ -389,10 +389,10 @@ resource "google_compute_instance_from_template" "scan-22" {
 
 resource "google_compute_instance_from_template" "struts2-23" {
   name = "${local.resource_prefix}struts2-23"
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.struts2-23.self_link}"
+      image = data.google_compute_image.struts2-23.self_link
     }
     auto_delete = true
   }
@@ -404,10 +404,10 @@ resource "google_compute_instance_from_template" "struts2-23" {
 
 resource "google_compute_instance_from_template" "struts2-24" {
   name = "${local.resource_prefix}struts2-24"
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.struts2-24.self_link}"
+      image = data.google_compute_image.struts2-24.self_link
     }
     auto_delete = true
   }
@@ -421,10 +421,10 @@ resource "google_compute_instance_from_template" "island-linux-250" {
   name = "${local.resource_prefix}island-linux-250"
   machine_type         = "n1-standard-2"
   tags = ["island", "linux", "ubuntu16"]
-  source_instance_template = "${local.default_ubuntu}"
+  source_instance_template = local.default_ubuntu
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.island-linux-250.self_link}"
+      image = data.google_compute_image.island-linux-250.self_link
     }
     auto_delete = true
   }
@@ -442,10 +442,10 @@ resource "google_compute_instance_from_template" "island-windows-251" {
   name = "${local.resource_prefix}island-windows-251"
   machine_type         = "n1-standard-2"
   tags = ["island", "windows", "windowsserver2016"]
-  source_instance_template = "${local.default_windows}"
+  source_instance_template = local.default_windows
   boot_disk{
     initialize_params {
-      image = "${data.google_compute_image.island-windows-251.self_link}"
+      image = data.google_compute_image.island-windows-251.self_link
     }
     auto_delete = true
   }
diff --git a/envs/monkey_zoo/terraform/templates.tf b/envs/monkey_zoo/terraform/templates.tf
index 6ae6dafdc..2659c31be 100644
--- a/envs/monkey_zoo/terraform/templates.tf
+++ b/envs/monkey_zoo/terraform/templates.tf
@@ -18,7 +18,7 @@ resource "google_compute_instance_template" "ubuntu16" {
     }
   }
   service_account {
-    email ="${local.service_account_email}"
+    email =local.service_account_email
     scopes=["cloud-platform"]
   }
 }
@@ -39,7 +39,7 @@ resource "google_compute_instance_template" "windows2016" {
     subnetwork="monkeyzoo-main"
   }
   service_account {
-    email="${local.service_account_email}"
+    email=local.service_account_email
     scopes=["cloud-platform"]
   }
 }