--- a/test/README.txt	Tue Feb 10 14:08:01 2015 +1100
+++ b/test/README.txt	Mon Feb 16 17:43:58 2015 +0100
@@ -1,3 +1,33 @@
+A number of tests uses the infrastructure of
+	db_test_base.py
+
+grep "from db_test_base" -l *.py
+benchmark.py
+session_common.py
+test_anydbm.py
+test_indexer.py
+test_memorydb.py
+test_mysql.py
+test_postgresql.py
+test_security.py
+test_sqlite.py
+test_tsearch2.py
+test_userauditor.py
+
+grep "import db_test_base" -l *.py
+test_cgi.py
+test_jinja2.py
+test_mailgw.py
+test_xmlrpc.py
+
+grep "import memory\|from memory" -l *.py 
+test_mailgw.py
+test_memorydb.py
+
+
+The remaining lines are an 2001 description from Richard,
+which probably is outdated:
+
 Structure of the tests:
 
    1   Test date classes