diff --git a/docs/development.rst b/docs/development.rst
index ec3fb60ce4f64dbba40a2de6336c0cbad8ef0e2c..e9e32c5890c29853c7a822f981fde06a9ad85cb0 100644
--- a/docs/development.rst
+++ b/docs/development.rst
@@ -168,7 +168,7 @@ perform the following steps:
 5. Clean Python caches to ensure your main development machine files
    do not interfere::
 
-     py3clean
+     py3clean .
 
 6. Run tests against all available environments::