diff --git a/docs/Contributing.md b/docs/Contributing.md
index 6718bae..45b21a4 100644
--- a/docs/Contributing.md
+++ b/docs/Contributing.md
@@ -13,3 +13,12 @@ Awesome! But before you write or modify the existing source code, please note th
 ```
 - Wrap lines only if really long (it does not matter 79 chars return)
 - For the rest a bit as it comes with a look at [PEP8](https://www.python.org/dev/peps/pep-0008/) :)
+
+Test your changes, please. For example, run the server via:
+```bash
+python3 pykms_Server.py -F STDOUT -s ./pykms_database.db
+```
+Then trigger (multiple) client requests and check the output for errors via:
+```bash
+python3 pykms_Client.py -F STDOUT -c 174f5409-0624-4ce3-b209-adde1091956b
+```