diff --git a/README.md b/README.md
index ea40bc5..7eec96f 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,5 @@
 Experimentation with Linux kernel modules to try and learn more about how the kernel works.
 
 Educational purposes only.
+
+Tested on Ubuntu 20.04, via Vagrant.