diff --git a/spec/acceptance/fixtures/auto-detect-with-provisioning.rb b/spec/acceptance/fixtures/auto-detect-with-provisioning.rb
index c69aad2..7ba1332 100644
--- a/spec/acceptance/fixtures/auto-detect-with-provisioning.rb
+++ b/spec/acceptance/fixtures/auto-detect-with-provisioning.rb
@@ -5,5 +5,6 @@ Vagrant.configure("2") do |config|
   config.cache.scope = :machine
 
   config.vm.box = 'precise64'
+  config.vm.box_url = 'http://files.vagrantup.com/precise64.box'
   config.vm.provision :shell, inline: 'apt-get update && apt-get install -y git'
 end
diff --git a/spec/acceptance/fixtures/auto-detect.rb b/spec/acceptance/fixtures/auto-detect.rb
index c04a23f..bd409a0 100644
--- a/spec/acceptance/fixtures/auto-detect.rb
+++ b/spec/acceptance/fixtures/auto-detect.rb
@@ -3,5 +3,6 @@ Vagrant.require_plugin 'vagrant-lxc'
 Vagrant.configure("2") do |config|
   config.cache.auto_detect = true
   config.vm.box = 'precise64'
+  config.vm.box_url = 'http://files.vagrantup.com/precise64.box'
   config.vm.provision :shell, inline: 'echo Hello!'
 end
diff --git a/spec/acceptance/fixtures/no-cachier-simple.rb b/spec/acceptance/fixtures/no-cachier-simple.rb
index 81ec9b0..c719a30 100644
--- a/spec/acceptance/fixtures/no-cachier-simple.rb
+++ b/spec/acceptance/fixtures/no-cachier-simple.rb
@@ -2,4 +2,5 @@ Vagrant.require_plugin 'vagrant-cachier'
 Vagrant.require_plugin 'vagrant-lxc'
 Vagrant.configure("2") do |config|
   config.vm.box = 'precise64'
+  config.vm.box_url = 'http://files.vagrantup.com/precise64.box'
 end
diff --git a/spec/acceptance/fixtures/no-cachier-with-provisioning.rb b/spec/acceptance/fixtures/no-cachier-with-provisioning.rb
index dad0816..8ee27fe 100644
--- a/spec/acceptance/fixtures/no-cachier-with-provisioning.rb
+++ b/spec/acceptance/fixtures/no-cachier-with-provisioning.rb
@@ -2,5 +2,6 @@ Vagrant.require_plugin 'vagrant-cachier'
 Vagrant.require_plugin 'vagrant-lxc'
 Vagrant.configure("2") do |config|
   config.vm.box = 'precise64'
+  config.vm.box_url = 'http://files.vagrantup.com/precise64.box'
   config.vm.provision :shell, inline: 'echo Hello!'
 end