diff --git a/lib/vagrant-libvirt/action/create_domain.rb b/lib/vagrant-libvirt/action/create_domain.rb
index 7fa3a5a..f30d37d 100644
--- a/lib/vagrant-libvirt/action/create_domain.rb
+++ b/lib/vagrant-libvirt/action/create_domain.rb
@@ -2,7 +2,9 @@
 
 require 'log4r'
 
+require 'vagrant-libvirt/util/erb_template'
 require 'vagrant-libvirt/util/resolvers'
+require 'vagrant-libvirt/util/storage_util'
 
 module VagrantPlugins
   module ProviderLibvirt
diff --git a/lib/vagrant-libvirt/action/destroy_domain.rb b/lib/vagrant-libvirt/action/destroy_domain.rb
index e6fd96c..95b32f9 100644
--- a/lib/vagrant-libvirt/action/destroy_domain.rb
+++ b/lib/vagrant-libvirt/action/destroy_domain.rb
@@ -8,6 +8,8 @@ rescue LoadError
   require 'rexml/rexml'
 end
 
+require 'vagrant-libvirt/util/domain_flags'
+
 module VagrantPlugins
   module ProviderLibvirt
     module Action
diff --git a/lib/vagrant-libvirt/action/handle_box_image.rb b/lib/vagrant-libvirt/action/handle_box_image.rb
index 37a6f9d..9c91c59 100644
--- a/lib/vagrant-libvirt/action/handle_box_image.rb
+++ b/lib/vagrant-libvirt/action/handle_box_image.rb
@@ -5,6 +5,8 @@ require 'open3'
 require 'json'
 
 require 'vagrant-libvirt/util/byte_number'
+require 'vagrant-libvirt/util/storage_util'
+require 'vagrant-libvirt/util/ui'
 
 module VagrantPlugins
   module ProviderLibvirt
diff --git a/lib/vagrant-libvirt/action/package_domain.rb b/lib/vagrant-libvirt/action/package_domain.rb
index eafa435..825960d 100644
--- a/lib/vagrant-libvirt/action/package_domain.rb
+++ b/lib/vagrant-libvirt/action/package_domain.rb
@@ -3,6 +3,7 @@
 require 'fileutils'
 require 'log4r'
 
+require 'vagrant-libvirt/util/ui'
 require 'vagrant-libvirt/util/unindent'
 
 module VagrantPlugins
diff --git a/lib/vagrant-libvirt/cap/synced_folder_9p.rb b/lib/vagrant-libvirt/cap/synced_folder_9p.rb
index 53b1810..251faf2 100644
--- a/lib/vagrant-libvirt/cap/synced_folder_9p.rb
+++ b/lib/vagrant-libvirt/cap/synced_folder_9p.rb
@@ -7,7 +7,9 @@ require 'digest/md5'
 
 require 'vagrant/util/subprocess'
 require 'vagrant/errors'
+
 require 'vagrant-libvirt/errors'
+require 'vagrant-libvirt/util/erb_template'
 
 module VagrantPlugins
   module SyncedFolder9P
diff --git a/lib/vagrant-libvirt/cap/synced_folder_virtiofs.rb b/lib/vagrant-libvirt/cap/synced_folder_virtiofs.rb
index 2c739b4..c57a6ac 100644
--- a/lib/vagrant-libvirt/cap/synced_folder_virtiofs.rb
+++ b/lib/vagrant-libvirt/cap/synced_folder_virtiofs.rb
@@ -5,9 +5,11 @@ require 'ostruct'
 require 'nokogiri'
 require 'digest/md5'
 
-require 'vagrant/util/subprocess'
 require 'vagrant/errors'
+require 'vagrant/util/subprocess'
+
 require 'vagrant-libvirt/errors'
+require 'vagrant-libvirt/util/erb_template'
 
 module VagrantPlugins
   module SyncedFolderVirtioFS
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index b161c28..197a473 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -38,13 +38,12 @@ rescue LoadError
   end
 end
 
-
-require 'vagrant-libvirt'
-require 'vagrant-spec/unit'
-
-Dir[File.dirname(__FILE__) + '/support/**/*.rb'].each { |f| require f }
-
 RSpec.configure do |config|
+  # set VAGRANT_HOME before any thing that requires vagrant is loaded to prevent
+  # the global plugin manager from trying to use the default VAGRANT_HOME.
+  temp_dir = Dir.mktmpdir("rspec-")
+  ENV['VAGRANT_HOME'] = temp_dir
+
   # ensure that setting of LIBVIRT_DEFAULT_URI in the environment is not picked
   # up directly by tests, instead they must set as needed. Some build envs will
   # may have it set to 'qemu:///session'.
@@ -52,6 +51,10 @@ RSpec.configure do |config|
     ENV.delete('LIBVIRT_DEFAULT_URI')
   end
 
+  config.after(:suite) do
+    FileUtils.remove_entry temp_dir
+  end
+
   config.mock_with :rspec do |mocks|
     mocks.verify_partial_doubles = true
   end
@@ -59,3 +62,7 @@ RSpec.configure do |config|
   # don't run acceptance tests by default
   config.filter_run_excluding :acceptance => true
 end
+
+require 'vagrant-spec/unit'
+
+Dir[File.dirname(__FILE__) + '/support/**/*.rb'].each { |f| require f }
diff --git a/spec/unit/plugin_spec.rb b/spec/unit/plugin_spec.rb
index 12a5395..0f8ce7b 100644
--- a/spec/unit/plugin_spec.rb
+++ b/spec/unit/plugin_spec.rb
@@ -3,6 +3,7 @@
 require 'spec_helper'
 require 'support/sharedcontext'
 
+require 'vagrant-libvirt'
 require 'vagrant-libvirt/plugin'