README.md in quality-8.1.0 vs README.md in quality-8.1.1

@@ -80,11 +80,11 @@
   # Defaults to t.ruby_dirs
   t.source_dirs.concat(%w(MyProject MyProjectTests))
 
   # Pick any extra files that are source files, but may not have
   # extensions--defaults to ['Rakefile']
-  t.extra_files = ['Foo', 'Rakefile']
+  t.extra_files = ['tools/check-script', 'Rakefile']
 
   # Relative path to output directory where *_high_water_mark
   # files will be read/written
   #
   # Defaults to 'metrics'
@@ -99,9 +99,21 @@
 ```
 
 ## Why
 
 See [this post for more information](http://blog.apiology.cc/2014/06/scalable-quality-part-1.html) on the problem the quality gem solves.
+
+## Code coverage
+
+You can pull a similar trick with code coverage using SimpleCov in Ruby--put 'simplecov' in your Gemfile, and add the code below into your test_helper.rb or spec_helper.rb.
+
+```
+require 'simplecov'
+SimpleCov.start
+SimpleCov.refuse_coverage_drop
+```
+
+After your first run, check in your coverage/.last_run.json.
 
 ## Maturity
 
 Quality uses [semantic versioning](http://semver.org/)--any incompatible changes will come out as major number updates.