diff --git a/TESTING.rst b/TESTING.rst
index 8abcd40e70..16dc3beffd 100644
--- a/TESTING.rst
+++ b/TESTING.rst
@@ -63,7 +63,7 @@ With `nose`
 You can use `nose`_ to run individual tests, as well as use for debugging
 portions of your code::
 
-    source .venv/bin/activate
+    . .venv/bin/activate
     pip install nose
     nosetests