diff -r 89b50258ad33 -r 14d91c36f88b README
--- a/README	Sat May 03 03:46:21 2014 +0530
+++ b/README	Tue Apr 15 14:06:20 2014 -0400
@@ -29,7 +29,12 @@
 ==========
 
 The simplest way to contribute is to issue a pull request on Bitbucket
-(https://bitbucket.org/marmoute/mutable-history).
+(https://bitbucket.org/marmoute/mutable-history). Please don't forget
+to update and run the tests when you fix a bug or add a feature. To
+run the tests:
+
+    cd tests
+    python run-tests.py --with-hg=/path/to/hg
 
 However, some cutting-edge changes may be found in a mutable repository hosted
 by logilab before they are published.