diff --git a/Development-Testing-Release.md b/Development-Testing-Release.md
index fda713f..f81563e 100644
--- a/Development-Testing-Release.md
+++ b/Development-Testing-Release.md
@@ -33,7 +33,15 @@ git clean -fdx
 flake8
 ```
 
-### Particular defined test
+### Run tests
+
+#### All defined tests
+
+```
+pytest
+```
+
+#### Particular defined test
 
 Option -k <pattern> can be used to select specific sub-tests