[#1664] Documented KEA_TLS_CHECK_VERBOSE

diff --git a/doc/devel/unit-tests.dox b/doc/devel/unit-tests.dox
index 359ef4c4b0c7dee1d48972dca6e8bb2c9e86f772..1120bc6547c77d05a19ff43b4af0739fa702d224 100644 (file)
--- a/doc/devel/unit-tests.dox
+++ b/doc/devel/unit-tests.dox
@@ -86,6 +86,11 @@ The following environment variable can affect the unit tests:
   will cause the test setup logic to always drop and create the database
   schema. The default value is "true".
 
+- KEA_TLS_CHECK_VERBOSE - Specifies the TLS check default verbosity. If not
+  set, TLS unit tests triggering expected failures are by default silent.
+  If set, these TLS unit tests display the error messages which are very
+  dependent on the cryptographic backend and boost library versions.
+
 @note Setting KEA_TEST_DB_WIPE_DATA_ONLY to false may dramatically
 increase the time it takes each unit test to execute.