diff --git a/bootstrapvz/common/tasks/host.py b/bootstrapvz/common/tasks/host.py
index 3776c75..075a912 100644
--- a/bootstrapvz/common/tasks/host.py
+++ b/bootstrapvz/common/tasks/host.py
@@ -5,7 +5,7 @@ from ..exceptions import TaskError
 
 class CheckExternalCommands(Task):
     description = 'Checking availability of external commands'
-    phase = phases.preparation
+    phase = phases.validation
 
     @classmethod
     def run(cls, info):
diff --git a/bootstrapvz/plugins/ansible/tasks.py b/bootstrapvz/plugins/ansible/tasks.py
index f2b6518..c7e3a5d 100644
--- a/bootstrapvz/plugins/ansible/tasks.py
+++ b/bootstrapvz/plugins/ansible/tasks.py
@@ -5,7 +5,7 @@ import os
 
 class CheckPlaybookPath(Task):
     description = 'Checking whether the playbook path exist'
-    phase = phases.preparation
+    phase = phases.validation
 
     @classmethod
     def run(cls, info):
diff --git a/bootstrapvz/plugins/apt_proxy/tasks.py b/bootstrapvz/plugins/apt_proxy/tasks.py
index 015fb69..9ce5304 100644
--- a/bootstrapvz/plugins/apt_proxy/tasks.py
+++ b/bootstrapvz/plugins/apt_proxy/tasks.py
@@ -7,7 +7,7 @@ import urllib2
 
 class CheckAptProxy(Task):
     description = 'Checking reachability of APT proxy server'
-    phase = phases.preparation
+    phase = phases.validation
 
     @classmethod
     def run(cls, info):
diff --git a/bootstrapvz/plugins/chef/tasks.py b/bootstrapvz/plugins/chef/tasks.py
index 649c287..ecc3fcf 100644
--- a/bootstrapvz/plugins/chef/tasks.py
+++ b/bootstrapvz/plugins/chef/tasks.py
@@ -5,7 +5,7 @@ import os
 
 class CheckAssetsPath(Task):
     description = 'Checking whether the assets path exist'
-    phase = phases.preparation
+    phase = phases.validation
 
     @classmethod
     def run(cls, info):
diff --git a/bootstrapvz/plugins/puppet/tasks.py b/bootstrapvz/plugins/puppet/tasks.py
index 5ea3d4d..cd12973 100644
--- a/bootstrapvz/plugins/puppet/tasks.py
+++ b/bootstrapvz/plugins/puppet/tasks.py
@@ -6,7 +6,7 @@ import os
 
 class CheckAssetsPath(Task):
     description = 'Checking whether the assets path exist'
-    phase = phases.preparation
+    phase = phases.validation
 
     @classmethod
     def run(cls, info):
@@ -22,7 +22,7 @@ class CheckAssetsPath(Task):
 
 class CheckManifestPath(Task):
     description = 'Checking whether the manifest path exist'
-    phase = phases.preparation
+    phase = phases.validation
 
     @classmethod
     def run(cls, info):
diff --git a/bootstrapvz/plugins/vagrant/tasks.py b/bootstrapvz/plugins/vagrant/tasks.py
index 9cd741f..49c8262 100644
--- a/bootstrapvz/plugins/vagrant/tasks.py
+++ b/bootstrapvz/plugins/vagrant/tasks.py
@@ -9,7 +9,7 @@ assets = os.path.normpath(os.path.join(os.path.dirname(__file__), 'assets'))
 
 class CheckBoxPath(Task):
     description = 'Checking if the vagrant box file already exists'
-    phase = phases.preparation
+    phase = phases.validation
 
     @classmethod
     def run(cls, info):
diff --git a/bootstrapvz/providers/virtualbox/tasks/guest_additions.py b/bootstrapvz/providers/virtualbox/tasks/guest_additions.py
index 7b4b929..5bf848e 100644
--- a/bootstrapvz/providers/virtualbox/tasks/guest_additions.py
+++ b/bootstrapvz/providers/virtualbox/tasks/guest_additions.py
@@ -9,7 +9,7 @@ assets = os.path.normpath(os.path.join(os.path.dirname(__file__), '../assets'))
 
 class CheckGuestAdditionsPath(Task):
     description = 'Checking whether the VirtualBox Guest Additions image exists'
-    phase = phases.preparation
+    phase = phases.validation
 
     @classmethod
     def run(cls, info):