diff --git a/HACKING.rst b/HACKING.rst
index fd63d64..ad5e821 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -213,8 +213,10 @@
 Sample Configuration File
 -------------------------
 The sample config file is autogenerated using a script. If any changes are made
-to the config variables in tempest then the sample config file must be
-regenerated. This can be done running the script: tools/generate_sample.sh
+to the config variables in tempest/config.py then the sample config file must be
+regenerated. This can be done running::
+
+  tox -egenconfig
 
 Unit Tests
 ----------