diff --git a/README.md b/README.md
index 518808162dd1ff1aad9c10ecd7bd72330778e21b..261dd9142b9d1eea956b387750ad3cc21df2a76d 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,11 @@ Here's the software you'll need installed:
 
 ## Testing
 
-Unit tests are under `browserid/tests/`, and you should run them often.  Like before committing code.
+Unit tests can be run by invoking `test.sh` at the top level, and you
+should run them often.  Like before committing code.  To fully test
+the code you should install mysql and have a well permissions `test`
+user (can create and drop databases).  If you don't have mysql installed,
+code testing is still possible (it just uses a little json database).
 
 ## Development model