diff --git a/test/unit/plugins/provisioners/chef/config/base_test.rb b/test/unit/plugins/provisioners/chef/config/base_test.rb
new file mode 100644
index 000000000..1f8fab9b0
--- /dev/null
+++ b/test/unit/plugins/provisioners/chef/config/base_test.rb
@@ -0,0 +1,262 @@
+require_relative "../../../../base"
+
+require Vagrant.source_root.join("plugins/provisioners/chef/config/base")
+
+describe VagrantPlugins::Chef::Config::Base, :focus do
+  include_context "unit"
+
+  subject { described_class.new }
+
+  let(:machine) { double("machine") }
+
+  describe "#arguments" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.arguments).to be(nil)
+		end
+  end
+
+  describe "#attempts" do
+		it "defaults to 1" do
+			subject.finalize!
+			expect(subject.attempts).to eq(1)
+		end
+  end
+
+  describe "#binary_path" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.binary_path).to be(nil)
+		end
+  end
+
+  describe "#binary_env" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.binary_env).to be(nil)
+		end
+  end
+
+  describe "#custom_config_path" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.custom_config_path).to be(nil)
+		end
+  end
+
+  describe "#environment" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.environment).to be(nil)
+		end
+  end
+
+  describe "#formatter" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.formatter).to be(nil)
+		end
+  end
+
+  describe "#http_proxy" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.http_proxy).to be(nil)
+		end
+  end
+
+  describe "#http_proxy_user" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.http_proxy_user).to be(nil)
+		end
+  end
+
+  describe "#http_proxy_pass" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.http_proxy_pass).to be(nil)
+		end
+  end
+
+  describe "#https_proxy" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.https_proxy).to be(nil)
+		end
+  end
+
+  describe "#https_proxy_user" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.https_proxy_user).to be(nil)
+		end
+  end
+
+  describe "#https_proxy_pass" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.https_proxy_pass).to be(nil)
+		end
+  end
+
+  describe "#log_level" do
+		it "defaults to :info" do
+			subject.finalize!
+			expect(subject.log_level).to be(:info)
+		end
+
+		it "is converted to a symbol" do
+			subject.log_level = "foo"
+			subject.finalize!
+			expect(subject.log_level).to eq(:foo)
+		end
+  end
+
+  describe "#no_proxy" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.no_proxy).to be(nil)
+		end
+  end
+
+  describe "#node_name" do
+		it "defaults to nil" do
+			subject.finalize!
+			expect(subject.node_name).to be(nil)
+		end
+  end
+
+  describe "#provisioning_path" do
+		it "defaults to a tmp_path" do
+			subject.finalize!
+			expect(subject.provisioning_path).to match(%r{/tmp/vagrant-chef-\d+})
+		end
+  end
+
+  describe "#file_backup_path" do
+		it "defaults to /var/chef/backup" do
+			subject.finalize!
+			expect(subject.file_backup_path).to eq("/var/chef/backup")
+		end
+  end
+
+  describe "#file_cache_path" do
+		it "defaults to /var/chef/cache" do
+			subject.finalize!
+			expect(subject.file_cache_path).to eq("/var/chef/cache")
+		end
+  end
+
+  describe "#verbose_logging" do
+		it "defaults to false" do
+			subject.finalize!
+			expect(subject.verbose_logging).to be(false)
+		end
+  end
+
+  describe "#run_list" do
+  	it "defaults to an empty array" do
+  		subject.finalize!
+  		expect(subject.run_list).to be_a(Array)
+  		expect(subject.run_list).to be_empty
+  	end
+  end
+
+  describe "#json" do
+  	it "defaults to an empty hash" do
+  		subject.finalize!
+  		expect(subject.json).to be_a(Hash)
+  		expect(subject.json).to be_empty
+  	end
+  end
+
+  describe "#add_recipe" do
+  	context "when the prefix is given" do
+  		it "adds the value to the run_list" do
+  			subject.add_recipe("recipe[foo::bar]")
+  			expect(subject.run_list).to eq %w(recipe[foo::bar])
+  		end
+  	end
+
+  	context "when the prefix is not given" do
+  		it "adds the prefixed value to the run_list" do
+  			subject.add_recipe("foo::bar")
+  			expect(subject.run_list).to eq %w(recipe[foo::bar])
+  		end
+  	end
+  end
+
+  describe "#add_role" do
+  	context "when the prefix is given" do
+  		it "adds the value to the run_list" do
+  			subject.add_role("role[foo]")
+  			expect(subject.run_list).to eq %w(role[foo])
+  		end
+  	end
+
+  	context "when the prefix is not given" do
+  		it "adds the prefixed value to the run_list" do
+  			subject.add_role("foo")
+  			expect(subject.run_list).to eq %w(role[foo])
+  		end
+  	end
+  end
+
+   describe "#validate_base" do
+  	context "when #custom_config_path does not exist" do
+  		let(:path) { "/path/to/file" }
+
+  		before do
+  			allow(File).to receive(:file?)
+  				.with(path)
+  				.and_return(false)
+
+  			allow(machine).to receive(:env)
+  				.and_return(double("env",
+  					root_path: "",
+  				))
+  		end
+
+  		it "returns an error" do
+  			subject.custom_config_path = path
+  			subject.finalize!
+
+  			expect(subject.validate_base(machine))
+  				.to eq ['Path specified for "custom_config_path" does not exist.']
+  		end
+  	end
+  end
+
+  describe "#merge" do
+  	it "merges the json hash" do
+  		a = described_class.new.tap do |i|
+  			i.json = { "foo" => "bar" }
+  		end
+  		b = described_class.new.tap do |i|
+  			i.json = { "zip" => "zap" }
+  		end
+
+  		result = a.merge(b)
+  		expect(result.json).to eq(
+  			"foo" => "bar",
+  			"zip" => "zap",
+  		)
+  	end
+
+  	it "appends the run_list array" do
+  		a = described_class.new.tap do |i|
+  			i.run_list = ["recipe[foo::bar]"]
+  		end
+  		b = described_class.new.tap do |i|
+  			i.run_list = ["recipe[zip::zap]"]
+  		end
+
+  		result = a.merge(b)
+  		expect(result.run_list).to eq %w(
+  			recipe[foo::bar]
+  			recipe[zip::zap]
+  		)
+  	end
+  end
+end