diff --git a/spec/unit/action/compress_rootfs_spec.rb b/spec/unit/action/compress_rootfs_spec.rb
index bedc9c5..b1caa8f 100644
--- a/spec/unit/action/compress_rootfs_spec.rb
+++ b/spec/unit/action/compress_rootfs_spec.rb
@@ -5,9 +5,9 @@ require 'vagrant-lxc/action/compress_rootfs'
 describe Vagrant::LXC::Action::CompressRootFS do
   let(:app)                    { mock(:app, call: true) }
   let(:env)                    { {machine: machine, ui: stub(info: true)} }
-  let(:machine)                { fire_double('Vagrant::Machine', provider: provider) }
-  let(:provider)               { fire_double('Vagrant::LXC::Provider', driver: driver) }
-  let(:driver)                 { fire_double('Vagrant::LXC::Driver', compress_rootfs: compressed_rootfs_path) }
+  let(:machine)                { instance_double('Vagrant::Machine', provider: provider) }
+  let(:provider)               { instance_double('Vagrant::LXC::Provider', driver: driver) }
+  let(:driver)                 { instance_double('Vagrant::LXC::Driver', compress_rootfs: compressed_rootfs_path) }
   let(:compressed_rootfs_path) { '/path/to/rootfs.tar.gz' }
 
   subject { described_class.new(app, env) }
diff --git a/spec/unit/action/forward_ports_spec.rb b/spec/unit/action/forward_ports_spec.rb
index 4c31edc..9dc2253 100644
--- a/spec/unit/action/forward_ports_spec.rb
+++ b/spec/unit/action/forward_ports_spec.rb
@@ -10,8 +10,8 @@ describe Vagrant::LXC::Action::ForwardPorts do
   let(:networks)     { [[:other_config, {}], [:forwarded_port, {guest: guest_port, host: host_port}]] }
   let(:host_port)    { 8080 }
   let(:guest_port)   { 80 }
-  let(:provider)     { fire_double('Vagrant::LXC::Provider', driver: driver) }
-  let(:driver)       { fire_double('Vagrant::LXC::Driver', assigned_ip: container_ip) }
+  let(:provider)     { instance_double('Vagrant::LXC::Provider', driver: driver) }
+  let(:driver)       { instance_double('Vagrant::LXC::Driver', assigned_ip: container_ip) }
   let(:container_ip) { '10.0.1.234' }
   let(:pid)          { 'a-pid' }
 
diff --git a/spec/unit/action/setup_package_files_spec.rb b/spec/unit/action/setup_package_files_spec.rb
index c5a4c7b..3c9a986 100644
--- a/spec/unit/action/setup_package_files_spec.rb
+++ b/spec/unit/action/setup_package_files_spec.rb
@@ -5,9 +5,9 @@ require 'vagrant-lxc/action/setup_package_files'
 describe Vagrant::LXC::Action::SetupPackageFiles do
   let(:app)         { mock(:app, call: true) }
   let(:env)         { {machine: machine, tmp_path: tmp_path, ui: stub(info: true), 'package.rootfs' => rootfs_path} }
-  let(:machine)     { fire_double('Vagrant::Machine', box: box) }
+  let(:machine)     { instance_double('Vagrant::Machine', box: box) }
   let!(:tmp_path)   { Pathname.new(Dir.mktmpdir) }
-  let(:box)         { fire_double('Vagrant::Box', directory: tmp_path.join('box')) }
+  let(:box)         { instance_double('Vagrant::Box', directory: tmp_path.join('box')) }
   let(:rootfs_path) { tmp_path.join('rootfs-amd64.tar.gz') }
 
   subject { described_class.new(app, env) }
diff --git a/spec/unit/driver_spec.rb b/spec/unit/driver_spec.rb
index f657648..b062bb9 100644
--- a/spec/unit/driver_spec.rb
+++ b/spec/unit/driver_spec.rb
@@ -9,7 +9,7 @@ describe Vagrant::LXC::Driver do
     let(:unknown_container) { described_class.new('unknown', cli) }
     let(:valid_container)   { described_class.new('valid', cli) }
     let(:new_container)     { described_class.new(nil) }
-    let(:cli)               { fire_double('Vagrant::LXC::Driver::CLI', list: ['valid']) }
+    let(:cli)               { instance_double('Vagrant::LXC::Driver::CLI', list: ['valid']) }
 
     it 'raises a ContainerNotFound error if an unknown container name gets provided' do
       expect {
@@ -37,7 +37,7 @@ describe Vagrant::LXC::Driver do
     let(:template_opts)  { {'--some' => 'random-option'} }
     let(:config_file)    { '/path/to/lxc-config-from-box' }
     let(:rootfs_tarball) { '/path/to/cache/rootfs.tar.gz' }
-    let(:cli)            { fire_double('Vagrant::LXC::Driver::CLI', :create => true, :name= => true) }
+    let(:cli)            { instance_double('Vagrant::LXC::Driver::CLI', :create => true, :name= => true) }
 
     subject { described_class.new(nil, cli) }
 
@@ -60,7 +60,7 @@ describe Vagrant::LXC::Driver do
   end
 
   describe 'destruction' do
-    let(:cli) { fire_double('Vagrant::LXC::Driver::CLI', destroy: true) }
+    let(:cli) { instance_double('Vagrant::LXC::Driver::CLI', destroy: true) }
 
     subject { described_class.new('name', cli) }
 
@@ -75,7 +75,7 @@ describe Vagrant::LXC::Driver do
     let(:customizations)         { [['a', '1'], ['b', '2']] }
     let(:internal_customization) { ['internal', 'customization'] }
     let(:rootfs)                 { ['rootfs', subject.rootfs_path.to_s] }
-    let(:cli)                    { fire_double('Vagrant::LXC::Driver::CLI', start: true) }
+    let(:cli)                    { instance_double('Vagrant::LXC::Driver::CLI', start: true) }
 
     subject { described_class.new('name', cli) }
 
@@ -95,7 +95,7 @@ describe Vagrant::LXC::Driver do
   end
 
   describe 'halt' do
-    let(:cli) { fire_double('Vagrant::LXC::Driver::CLI', shutdown: true) }
+    let(:cli) { instance_double('Vagrant::LXC::Driver::CLI', shutdown: true) }
 
     subject { described_class.new('name', cli) }
 
@@ -123,7 +123,7 @@ describe Vagrant::LXC::Driver do
 
   describe 'state' do
     let(:cli_state) { :something }
-    let(:cli)       { fire_double('Vagrant::LXC::Driver::CLI', state: cli_state) }
+    let(:cli)       { instance_double('Vagrant::LXC::Driver::CLI', state: cli_state) }
 
     subject { described_class.new('name', cli) }
 
@@ -136,7 +136,7 @@ describe Vagrant::LXC::Driver do
     # This ip is set on the sample-ip-addr-output fixture
     let(:ip)              { "10.0.254.137" }
     let(:ifconfig_output) { File.read('spec/fixtures/sample-ip-addr-output') }
-    let(:cli)             { fire_double('Vagrant::LXC::Driver::CLI', :attach => ifconfig_output) }
+    let(:cli)             { instance_double('Vagrant::LXC::Driver::CLI', :attach => ifconfig_output) }
 
     subject { described_class.new('name', cli) }