diff --git a/lib/vmpooler/providers/gce.rb b/lib/vmpooler/providers/gce.rb
index 3da189f..f8ccafd 100644
--- a/lib/vmpooler/providers/gce.rb
+++ b/lib/vmpooler/providers/gce.rb
@@ -86,8 +86,8 @@ def machine_type(pool_name)
           return provider_config['machine_type'] if provider_config['machine_type']
         end
 
-        def dns_zone
-          provider_config['dns_zone']
+        def domain
+          provider_config['domain']
         end
 
         def dns_zone_resource_name
@@ -459,7 +459,7 @@ def destroy_vm(pool_name, vm_name)
         def vm_ready?(_pool_name, vm_name)
           begin
             # TODO: we could use a healthcheck resource attached to instance
-            open_socket(vm_name, dns_zone || global_config[:config]['domain'])
+            open_socket(vm_name, domain || global_config[:config]['domain'])
           rescue StandardError => _e
             return false
           end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 14ab878..6cd4447 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,11 +1,9 @@
 # frozen_string_literal: true
 
 require 'simplecov'
-=begin
 SimpleCov.start do
   add_filter '/spec/'
 end
-=end
 require 'helpers'
 require 'rspec'
 require 'vmpooler'
diff --git a/spec/unit/providers/gce_spec.rb b/spec/unit/providers/gce_spec.rb
index 3075f8a..550e3bf 100644
--- a/spec/unit/providers/gce_spec.rb
+++ b/spec/unit/providers/gce_spec.rb
@@ -75,7 +75,7 @@
     zone: '#{zone}'
     network_name: 'projects/itsysopsnetworking/global/networks/shared1'
     dns_zone_resource_name: 'test-vmpooler-puppet-net'
-    dns_zone: 'test.vmpooler.puppet.net'
+    domain: 'test.vmpooler.puppet.net'
 :pools:
   - name: '#{poolname}'
     alias: [ 'mockpool' ]
diff --git a/vmpooler.yaml.example b/vmpooler.yaml.example
index b784c19..c51265d 100644
--- a/vmpooler.yaml.example
+++ b/vmpooler.yaml.example
@@ -75,10 +75,11 @@
 #   - dns_zone_resource_name
 #     The name given to the DNS zone ressource. This is not the domain, but the name identifier of a zone eg example-com
 #     (optional) when not set, the dns setup / teardown is skipped
-#   - dns_zone
-#     The dns zone domain set for the dns_zone_resource_name. This becomes the domain part of the FQDN ie $vm_name.$dns_zone
+#   - domain
+#     Overwrites the global domain parameter. This should match the dns zone domain set for the dns_zone_resource_name.
+#     It is used to infer the domain part of the FQDN ie $vm_name.$domain
 #     When setting multiple providers at the same time, this value should be set for each GCE pools.
-#     default to: global config:domain. if dns_zone is set, it overwrites the top-level domain when checking vm_ready?
+#     (optional) If not explicitely set, the FQDN is inferred using the global 'domain' config parameter
 # Example:
 
   :gce:
@@ -86,6 +87,8 @@
     zone: 'us-central1-f'
     machine_type: ''
     network_name: ''
+    dns_zone_resource_name: 'subdomain-example-com'
+    domain: 'subdomain.example.com'
 
 # :pools:
 #