diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8b05872..70fd3b8 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -65,7 +65,8 @@ the extension)  with `_cdb_`.
 Running the Python tests:
 
 ```
-nosetests python/crankdown/test
+cd python/crankdown
+nosetests test
 ```
 
 Installing the Python package and running the PostgreSQL tests: