Added comment on pytest

README.md

@@ -37,6 +37,13 @@ Ubuntu
 sudo apt install imagemagick
 ```
 
+## Tests
+
+The package has unit testing included through `pytest`. This may be executed through:
+```
+python3 -m pytest tests
+```
+
 ## References
 
 This project utilises code from digitalduke (https://github.com/digitalduke/otpauth-migration-decoder)