diff --git a/tests/Descriptions.txt b/tests/Descriptions.txt
index 5b546e9..b6309f3 100644
--- a/tests/Descriptions.txt
+++ b/tests/Descriptions.txt
@@ -1,14 +1,15 @@
 test_suites
     The various 'test_suite_XXX' programs from the 'tests' directory, executed
     using 'make check' (Unix make) or 'make test' (Cmake), include test cases
-    (reference test vectors, sanity checks, etc.) for all modules except the
-    SSL modules.
+    (reference test vectors, sanity checks, malformed input for parsing
+    functions, etc.) for all modules except the SSL modules.
 
 compat
-    The 'tests/compat.sh' script checks interoperability with OpenSSL for every
-    ciphersuite, in every version, using client authentication or not.  For
-    each ciphersuite/version it performs a full handshake and a small data
-    exchange.
+    The 'tests/compat.sh' script checks interoperability with OpenSSL and
+    GnuTLS (and ourselves!) for every common ciphersuite, in every TLS
+    version, both ways (client/server), using client authentication or not.
+    For each ciphersuite/version/side/authmode it performs a full handshake
+    and a small data exchange. 
 
 ssl_opt
     The 'tests/ssl-opt.sh' script checks various options and/or operations not