diff --git a/test/unit/plugins/provisioners/ansible/config_test.rb b/test/unit/plugins/provisioners/ansible/config_test.rb
new file mode 100644
index 000000000..5d00b255f
--- /dev/null
+++ b/test/unit/plugins/provisioners/ansible/config_test.rb
@@ -0,0 +1,42 @@
+require_relative "../../../base"
+
+require Vagrant.source_root.join("plugins/provisioners/ansible/config")
+
+describe VagrantPlugins::Ansible::Config do
+  include_context "unit"
+
+  subject { described_class.new }
+
+  let(:machine) { double("machine", env: Vagrant::Environment.new) }
+  let(:file_that_exists) { File.expand_path(__FILE__) }
+
+  describe "#validate" do
+    it "returns an error if playbook file does not exist" do
+      non_existing_file = "/this/does/not/exist"
+
+      subject.playbook = non_existing_file
+      subject.finalize!
+
+      result = subject.validate(machine)
+      expect(result["ansible provisioner"]).to eql([
+        I18n.t("vagrant.provisioners.ansible.playbook_path_invalid",
+               :path => non_existing_file)
+      ])
+    end
+
+    it "returns an error if inventory_path is specified, but does not exist" do
+      non_existing_file = "/this/does/not/exist"
+
+      subject.playbook = file_that_exists
+      subject.inventory_path = non_existing_file
+      subject.finalize!
+
+      result = subject.validate(machine)
+      expect(result["ansible provisioner"]).to eql([
+        I18n.t("vagrant.provisioners.ansible.inventory_path_invalid",
+               :path => non_existing_file)
+      ])
+    end
+
+  end
+end
diff --git a/test/unit/plugins/provisioners/ansible/provisioner_test.rb b/test/unit/plugins/provisioners/ansible/provisioner_test.rb
new file mode 100644
index 000000000..6ec3eba31
--- /dev/null
+++ b/test/unit/plugins/provisioners/ansible/provisioner_test.rb
@@ -0,0 +1,180 @@
+require_relative "../../../base"
+
+require Vagrant.source_root.join("plugins/provisioners/ansible/provisioner")
+
+describe VagrantPlugins::Ansible::Provisioner do
+  include_context "unit"
+
+  subject { described_class.new(machine, config) }
+
+  let(:iso_env) do
+    # We have to create a Vagrantfile so there is a Vagrant Environment
+    env = isolated_environment
+    env.vagrantfile("")
+    env.create_vagrant_env
+  end
+
+  let(:machine) { iso_env.machine(iso_env.machine_names[0], :dummy) }
+  let(:config)  { double("config") }
+
+  let(:ssh_info) {{
+    private_key_path: ['/path/to/my/key'],
+    username: 'testuser'
+  }}
+
+  before do
+    machine.stub(ssh_info: ssh_info)
+
+    config.stub(playbook: 'playbook.yml')
+    config.stub(extra_vars: nil)
+    config.stub(inventory_path: nil)
+    config.stub(ask_sudo_pass: nil)
+    config.stub(limit: nil)
+    config.stub(sudo: nil)
+    config.stub(sudo_user: nil)
+    config.stub(verbose: nil)
+    config.stub(tags: nil)
+    config.stub(skip_tags: nil)
+    config.stub(start_at_task: nil)
+    config.stub(groups: {})
+    config.stub(host_key_checking: 'false')
+    config.stub(raw_arguments: nil)
+    config.stub(raw_ssh_args: nil)
+  end
+
+  shared_examples_for "an ansible-playbook subprocess" do
+    it "sets default arguments" do
+      expect(Vagrant::Util::Subprocess).to receive(:execute).with { |*args|
+
+        index = args.find_index("ansible-playbook")
+        expect(index).to eql(0)
+        index = args.find_index("--private-key=/path/to/my/key")
+        expect(index).to eql(1)
+        index = args.find_index("--user=testuser")
+        expect(index).to eql(2)
+
+        index = args.find_index("--limit=#{machine.name}")
+        expect(index).to be > 0
+
+        index = args.find_index("playbook.yml")
+        expect(index).to eql(args.length-2)
+      }
+      subject.provision
+    end
+
+    it "exports default environment variables" do
+      expect(Vagrant::Util::Subprocess).to receive(:execute).with { |*args|
+        cmd_opts = args.last
+        expect(cmd_opts[:env]['ANSIBLE_FORCE_COLOR']).to eql("true")
+        expect(cmd_opts[:env]['ANSIBLE_HOST_KEY_CHECKING']).to eql("false")
+        expect(cmd_opts[:env]['PYTHONUNBUFFERED']).to eql(1)
+      }
+      subject.provision
+    end
+  end
+
+  shared_examples_for "SSH transport mode is not forced" do
+    it "does not export ANSIBLE_SSH_ARGS" do
+      expect(Vagrant::Util::Subprocess).to receive(:execute).with { |*args|
+        cmd_opts = args.last
+        expect(cmd_opts[:env]['ANSIBLE_SSH_ARGS']).to be_nil
+      }
+      subject.provision
+    end
+    it "does not force SSH transport mode" do
+      expect(Vagrant::Util::Subprocess).to receive(:execute).with { |*args|
+        index = args.find_index("--connection=ssh")
+        expect(index).to be_nil
+      }
+      subject.provision
+    end
+  end
+
+  shared_examples_for "SSH transport mode is forced" do
+    it "sets --connection=ssh argument" do
+      expect(Vagrant::Util::Subprocess).to receive(:execute).with { |*args|
+        index = args.find_index("--connection=ssh")
+        expect(index).to be > 0
+      }
+      subject.provision
+    end
+    it "enables ControlPersist (like Ansible defaults) via ANSIBLE_SSH_ARGS" do
+      expect(Vagrant::Util::Subprocess).to receive(:execute).with { |*args|
+        cmd_opts = args.last
+        expect(cmd_opts[:env]['ANSIBLE_SSH_ARGS']).to include("-o ControlMaster=auto")
+        expect(cmd_opts[:env]['ANSIBLE_SSH_ARGS']).to include("-o ControlPersist=60s")
+      }
+      subject.provision
+    end
+  end
+
+  describe "#provision" do
+
+    let(:result) { Vagrant::Util::Subprocess::Result.new(0, "", "") }
+
+    before do
+      Vagrant::Util::Subprocess.stub(execute: result)
+    end
+
+    it "doesn't raise an error if it succeeds" do
+      subject.provision
+    end
+
+    it "raises an error if the exit code is non-zero" do
+      Vagrant::Util::Subprocess.stub(
+        execute: Vagrant::Util::Subprocess::Result.new(1, "", ""))
+
+      expect {subject.provision}.
+        to raise_error(Vagrant::Errors::AnsibleFailed)
+    end
+
+    describe "with default options" do
+      it_behaves_like 'an ansible-playbook subprocess'
+      it_behaves_like 'SSH transport mode is not forced'
+
+      it "generates the inventory" do
+        expect(Vagrant::Util::Subprocess).to receive(:execute).with { |*args|
+          index = args.find_index("--inventory-file=#{File.join(machine.env.local_data_path, %w(provisioners ansible inventory vagrant_ansible_inventory))}")
+          expect(index).to be > 0
+        }
+        subject.provision
+      end
+    end
+
+    describe "with multiple SSH identities" do
+      before do
+        ssh_info[:private_key_path] = ['/path/to/my/key', '/an/other/identity', '/yet/an/other/key']
+      end
+
+      it_behaves_like 'an ansible-playbook subprocess'
+      it_behaves_like 'SSH transport mode is forced'
+
+      it "passes additional Identity Files via ANSIBLE_SSH_ARGS" do
+        expect(Vagrant::Util::Subprocess).to receive(:execute).with { |*args|
+          cmd_opts = args.last
+          expect(cmd_opts[:env]['ANSIBLE_SSH_ARGS']).to include("-o IdentityFile=/an/other/identity")
+          expect(cmd_opts[:env]['ANSIBLE_SSH_ARGS']).to include("-o IdentityFile=/yet/an/other/key")
+        }
+        subject.provision
+      end
+    end
+
+    describe "with ssh forwarding enabled" do
+      before do
+        ssh_info[:forward_agent] = true
+      end
+
+      it_behaves_like 'an ansible-playbook subprocess'
+      it_behaves_like 'SSH transport mode is forced'
+
+      it "enables SSH-Forwarding via ANSIBLE_SSH_ARGS" do
+        expect(Vagrant::Util::Subprocess).to receive(:execute).with { |*args|
+          cmd_opts = args.last
+          expect(cmd_opts[:env]['ANSIBLE_SSH_ARGS']).to include("-o ForwardAgent=yes")
+        }
+        subject.provision
+      end
+    end
+
+  end
+end