Since you check explicitly for values like "abc" here, your test should define them in line 4 like so:

```ruby
let(:text_layer) { create :text_layer, color: 'abc' }
```

This make the test here more expressive, since it is more clear where the data you check here comes from. It also makes the test more robust, because you prevent false positive failures when you ever change the value in the factory.