Installation/Visualisation-Module-Installation-(includes-the-Core-Module).md

@@ -141,6 +141,8 @@ Then run :
 cd <complete-package-name>/lib/python3.8/site-packages/sempy/<core-or-visualisation>/
 ```
 
+Note : for visualisation, you need to go a little deeper to run the tests with ```bash cd tests```
+
 And then run the unittests 
 ```bash
 python -m unittest