RSpec doesn't give me any backtrace

Hey,

I trying to get a backtrace with rspec but I can't get it working for some reason.

This is the test file: require 'spec_helper'

describe ActivityReport do   it "should create a new instance given valid attributes" do     activity = Factory(:activity_report)   end end

This is the command I run: rspec --backtrace spec/models/activity_report_spec.rb

And this is what I get: No examples matched {:focus=>true}. Running all.

ActivityReport   should create a new instance given valid attributes (FAILED - 1)

Failures:

  1) ActivityReport should create a new instance given valid attributes      Failure/Error: Unable to find matching line from backtrace      SystemStackError:        stack level too deep