```ruby
require "test_helper"
require "html/pipeline/rouge_filter"

class HTML::Pipeline::RougeFilterTest < Minitest::Test
  RougeFilter = HTML::Pipeline::RougeFilter

  def setup
  end

  def test_highlight_default
    filter = RougeFilter.new \
      "<pre>hello</pre>", highlight: "coffeescript"

    doc = filter.call
    assert !doc.css(".highlight-coffeescript").empty?
  end

  def test_highlight_default_will_not_override
    filter = RougeFilter.new \
      "<pre lang='ruby'>hello</pre>", highlight: "coffeescript"

    doc = filter.call
    assert doc.css(".highlight-coffeescript").empty?
    assert !doc.css(".highlight-ruby").empty?
  end

  def test_version
    assert_equal HTML_Pipeline::RougeFilter::VERSION, "0.0.1"
  end
end
```

Remove test for testing test setup.
user
```ruby
require "test_helper"
require "html/pipeline/rouge_filter"

class HTML::Pipeline::RougeFilterTest < Minitest::Test
  RougeFilter = HTML::Pipeline::RougeFilter

  def setup
  end

  def test_highlight_default
    filter = RougeFilter.new \
      "<pre>hello</pre>", highlight: "coffeescript"

    doc = filter.call
    assert !doc.css(".highlight-coffeescript").empty?
  end

  def test_highlight_default_will_not_override
    filter = RougeFilter.new \
      "<pre lang='ruby'>hello</pre>", highlight: "coffeescript"

    doc = filter.call
    assert doc.css(".highlight-coffeescript").empty?
    assert !doc.css(".highlight-ruby").empty?
  end
end
```
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