diff --git a/README.md b/README.md
index cd9e908..95cead3 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,6 @@ CC=gcc-11 CXX=g++-11 gmake all SHELL=$(brew --prefix)/bin/bash
 **ALSO NOTE** If you want `m68k-amigaos-gdb` then you have to build it with `gcc`
 
 ### macOs on Mi1
-
 Native builds on M1 Macs are now directly supported.
 
 ### Windows with Cygwin
@@ -134,3 +133,25 @@ m68k-amigaos-gcc test.cpp -mcrt=nix13
 ```
 
 The include files for 1.3 - which are picked up by the compiler if `-mcrt=nix13` is used - can be found at `<PREFIX>/m68k-amigaos/ndk13-include` i.E. `/opt/amiga/m68k-amigaos/ndk13-include`
+
+## Checking gcc
+
+To check the built version you may consider to run the gcc dejagnu tests. This does not cover everything but it's a start.
+The tests are using my improved version of VAMOS (downstream of https://github.com/cnvogelg/amitools) to emulate the Amiga,
+and right now not all improvements went back into the upstream.
+
+### Debian / Ubuntu
+```
+sudo apt install dejagnu
+sudo cp baseboards/* /usr/share/dejagnu/baseboards
+pip install -U git+https://github.com/bebbo/amitools.git  
+make check
+```
+
+### macOS
+```
+brew install dejagnu
+cp baseboards/* $(brew --prefix)/opt/dejagnu/share/dejagnu/baseboards
+pip install -U  git+https://github.com/bebbo/amitools.git  
+make check
+```