diff --git a/test/unit/vagrant/machine_test.rb b/test/unit/vagrant/machine_test.rb
index 128df3d6f..22e3a13ca 100644
--- a/test/unit/vagrant/machine_test.rb
+++ b/test/unit/vagrant/machine_test.rb
@@ -252,10 +252,10 @@ describe Vagrant::Machine do
       expect(machine).to eql(instance)
     end
 
-    it "should pass any extra options to the environment" do
+    it "should pass any extra options to the environment as strings" do
       action_name = :up
       foo         = nil
-      callable    = lambda { |env| foo = env[:foo] }
+      callable    = lambda { |env| foo = env["foo"] }
 
       allow(provider).to receive(:action).with(action_name).and_return(callable)
       instance.action(:up, foo: :bar)