README.markdown in humanize-1.2.1 vs README.markdown in humanize-1.2.2

@@ -76,9 +76,15 @@
 
 1. 0.120000   0.000000   0.120000 (  0.117996)
 2. 0.120000   0.000000   0.120000 (  0.116230)
 3. 0.130000   0.000000   0.130000 (  0.122856)
 
+## Testing
+
+Install development dependencies by running `bundle install`.
+
+You can run mutation testing by calling `bin/run_mutant`.
+
 ## Credits
 
 * *Original idea*: Brenton Fletcher
 * *Unbastardisation of original idea*: Ryan Bigg
 * *Awesome speed up*: Jack "Chendo" Chen