diff --git a/doc/dev/tests b/doc/dev/tests
index 94a78af19e..4725fc8450 100644
--- a/doc/dev/tests
+++ b/doc/dev/tests
@@ -1,7 +1,7 @@
 Copyright (C) 2000  Internet Software Consortium.
 See COPYRIGHT in the source root or http://isc.org/copyright.html for terms.
 
-$Id: tests,v 1.8 2000/08/09 04:37:36 tale Exp $
+$Id: tests,v 1.9 2000/11/02 17:54:30 mws Exp $
 
 We do hourly test builds of the bind9 tree.  This is an attempt to
 document how they work.
@@ -102,3 +102,12 @@ The .nfs* files cannot be deleted, but they can be moved, so one way
 of fixing this is to move them to ~wpk.
 
 
+Failure locking
+
+When a test fails, no further testing is done on that host.  To remove the
+lockout and allow more tests to be run, remove the file
+/proj/build-reports/bind9/hosts/{TARGET}/failed
+
+The failed file itself contains an exit code, which is not particularly
+useful.  The more useful information is in the various log files under
+the build report.