Reproducing https://github.com/rspec/rspec-core/issues/730. Run `rake`.

Gemfile

source "https://rubygems.org"

gem "rspec"
gem "rake"

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    diff-lcs (1.1.3)
    rake (0.9.2.2)
    rspec (2.12.0)
      rspec-core (~> 2.12.0)
      rspec-expectations (~> 2.12.0)
      rspec-mocks (~> 2.12.0)
    rspec-core (2.12.1)
    rspec-expectations (2.12.0)
      diff-lcs (~> 1.1.3)
    rspec-mocks (2.12.0)

PLATFORMS
  ruby

DEPENDENCIES
  rake
  rspec

profile_spec.rb

describe "profiling" do
  it "is fast" do
  end

  it "is slow" do
    sleep 3
  end

  it "is pending" do
    pending "is pending"
  end

  it "is failing", failing: true do
    throw "this is failing"
  end
end

Rakefile

task :default do
  puts "This shows profile info:"
  sh "rspec profile_spec.rb --profile --tag ~failing"

  puts '-' * 80
  puts "This doesn't:"
  sh "rspec profile_spec.rb --profile"
end