diff --git a/test/unit/vagrant/action/builtin/is_env_set_test.rb b/test/unit/vagrant/action/builtin/is_env_set_test.rb
new file mode 100644
index 000000000..56eafa956
--- /dev/null
+++ b/test/unit/vagrant/action/builtin/is_env_set_test.rb
@@ -0,0 +1,31 @@
+require "pathname"
+require "tmpdir"
+
+require File.expand_path("../../../../base", __FILE__)
+
+describe Vagrant::Action::Builtin::IsEnvSet do
+  let(:app) { lambda { |env| } }
+  let(:env) { { } }
+
+  describe "#call" do
+    it "sets result to true if it is set" do
+      env[:bar] = true
+
+      subject = described_class.new(app, env, :bar)
+
+      expect(app).to receive(:call).with(env)
+
+      subject.call(env)
+      expect(env[:result]).to be_true
+    end
+
+    it "sets result to false if it isn't set" do
+      subject = described_class.new(app, env, :bar)
+
+      expect(app).to receive(:call).with(env)
+
+      subject.call(env)
+      expect(env[:result]).to be_false
+    end
+  end
+end