Let's start by getting the correct test.

You have added a test that checks a global variable `@@vehicles_made` --- not the Vehicle's class variable `@@vehicles_made`

So, our test should reference that. In additional, the "should change" requires a bit of a different syntax

```ruby
describe Vehicle do	
	it "tracks the number of vehicles created" do
      expect {
        Motorcycle.new
      } .to change{Vehicle.vehicle_count}.by(1)
	end
end
```

Then, to get this to pass, we add a method to Vehicle

```ruby
    def self.vehicle_count
      @@vehicles_made
    end
```